I purchased the online version of Advanced C and Unix course last month. I am unable to open the course contents,  I have tried clearing the browser data (both in chrome and IE) but still it does not resolve the issue. I have to logout and login several times. After several attempts even if I login, the audio stops playing in the middle. for eg. Audio 8a, I have tried several times but stops in the middle.  I have raised the issue with your technical guys but still the problem is not resolved. I am unable to proceed with the course. Kindly resolve the issue so that I can proceed with the course.