[Solved] Problem - Renoises freezes with new card

My graphics card is a Nvidea GeForce GT 640 and I’m on Windows Vista.
The graphics for renoise keep freezing when I use it now.
The audio is fine, but it won’t follow the playback anymore and the graphics that follow the volumes don’t run smoothly anymore. Any ideas on how to fix this? Thanks.

I made a video of the problem if that helps anyone. I’d really like to buy this program, but I need it work with my computer first.

How is your framerate setting in the GUI preferences? Is that checkbox turned on?

Hi. The framerate doesn’t make a difference. I installed a new driver from nvidia fixed the problem totally. Thanks for your help.