Support and site requirements

See also:

Technical Support Forums | Help with Registration | Recover your password

Frequently asked Questions

Q: I can’t download notes – system logs me out 

Answer: Reload/Refresh the browser page – see below how  to Force refresh if you are not sure. and the system will log you in. it may happen when you do not store cookies on your PC.

Q: I tried to register but not received activation email..

Answer: Most likely you have registered with the same email address already a while back. You should try and reset your password. You can only create one account with the same email address.

Q. How to open PDF file?

Answer: Download free PDF reader for your PC from Adobe website

Q:  I can’t view lectures

Answer: Please try another browser on your device. If still nothing is showing, it is possible the videos are blocked in your country – try Tor browser or you may have to use VPN services.

Q: Why can’t I watch videos through my private network, firewall, or proxy server?

If you have a firewall or anti-virus software enabled—or if you’re connected to the Internet through a proxy server—you may need to whitelist the domains below in order to access Vimeo videos. This may also be necessary if you’re embedding videos on your company’s intranet or accessing them through a private network.




Please note:

We do not provide private support by email. If you need any help with our content, please search the site and the forums, many questions have been already answered.

If  you still have any questions please post your questions on the technical support on the forums.

Please try to provide as much information as possible about your Device/Operating system or Browser. Simply saying ‘ video does not play’  is not very helpful to figure out why you can’t play the video!

Internet Browsers

You can access our site with any operating system (Windows, Mac or Linux) PC and Laptop computers. Smartphones and Tablets

However, we do recommend  that you download and use the latest versions of internet browsers, on Windows: Google or on Mac: Apple Safari.

You can download latest version of your browsers here:
Google Chrome   |  Apple Safari |   Firefox 

if you can’t watch our lectures because your country  OR Internet Provider  blocks certain internet features, you should try FREE  Tor Browser

Some users also suggested using: Extension for Chrome Browser: ZenMate Security & Privacy VPN

Browser issues

If you cannot download the course notes (the system logs you out and you have to login again) – Force Refresh the page – see below how 

Some issues that you encounter with can be solved by changing your browser settings, refreshing the page, or clearing the browser cache and cookies.

Force Refresh

A force refresh or reload will cause the browser to re-check with the web server to make sure it has the latest copy of the web page you are viewing. Here are keyboard shortcuts for force refreshing your browser:

  • Windows: Ctrl + F5
  • Mac/Apple: Cmd + R
  • Linux: F5

Clear Your Cache and Cookies

Each time you access a web page, your web browser stores a temporary copy of the files needed to display the web page to you. Those temporary files are called the browser cache. If your cache is not updating properly or if it’s stuck, you could be viewing an older version of some of the supporting files that run

If you are experiencing problems displaying pages, clearing the browser cache is a good first step to try to resolve the issue. If that doesn’t help, you should also try clearing the browser cookies. Instructions for clearing cache and cookies are different for each browser and version.

More Troubleshooting

If you are still having trouble, here are a few more things you can try:

Note: We recommend that you use either FirefoxChrome or Safari for optimal performance.

Mobile devices and Tablets

The video content presented on this site also requires JavaScript to be enabled in your browser, if you are you using a browser with JavaScript disabled please enable it now.

Also certain pop up blockers/advert blockers  or flash blockers – they have to be turned OFF, or you may experience problem with access to video content. Using ad blockers is not advised for another reason! This website exists because of the advertising, if you decide to use ad blockers, do not expect us to deliver any new lectures and updates in the future.


Video lectures are NOT downloadable, you can only watch online, this is the only way to keep the site is free

Apple Safari browser – does not need flash player anymore, all lectures should work fine! However if you are using Internet Explorer / Chrome or Firefox, you need to have flash player installed.

All Lectures are streamed in MP4 format and work  on all Apple devices as Apple fully supports MP4 streaming.

If our lectures are important to you, then before you buy your new phone/tablet  check in the store if the lectures work – or ASK in the the store for help

If you can’t access lectures – Please contact your network administrator (if you try to access lectures in your office) or your Internet Provider if you have problems from home.

This could happen when you try to access the stream from your office or campus networks.

Get free Adobe Flash Player here>>

Course notes

Downloadable OpenTuition Course notes are in PDF format

(If you need PDF viewer, download free latest Version XI (11.0.06) of Adobe PDF Reader here >>

You are also advised, to turn off any download managers you are using! They will corrupt the file!
Modern browsers can easily and fast download files.



To access chatroom you need adobe flash player.
To login: UseRNamE and PaSSwoRD are case sensitive.

If chatroom is NOT accessible, please call/email your Internet Service Provider and ask them to open port 1935
(sometimes firewall on your PC/router may block your access also so please open port 1935)

PDF Creator
If you wish to share your own notes on the forums with other members, the best format is PDF, to create  pdf files, you can download and install on your PC free PDF creator/printer like: then you can print the flash files to newly installed pdf printer. – just like the real printer, except, you will have Pdf files on your computer.

NOTE: Uploading copyrighted materials is not allowed and you will be banned from the website!