I have tried latest .net version (5.08.02). I get this same error, but it doesn't happen so often.

Exception happens in Windows file quartz.dll (as seen in log)

Problem is this:

http://img99.imageshack.us/img99/8039/apierrorgl2.jpg

Happens often when change channels.

Here is memproof debug:

http://img129.imageshack.us/img129/6067/accessviolationpi2.jpg

see 2 Access violations and then application is terminated.

I downloaded old version ProgDVB 4 ...