Can't make screenshots anymore

Hi.

I have a problem with taking screenshots in game. A few days ago this function simply stopped working for me. I haven't installed anything at that time and my computer doesn't have any spy-ware/malware or viruses running. I'm running the game on WinXP/SP2 with administrator rights. I've tried just about anything that was posted on this topic (clearing or deleting Screen folder,...). In-game when I press print-screen just nothing happens. A screen blinks for a frame (as it used to do before as it renders everything at full detail/no-LOD) but nothing happens after that. There is no "Screenshot was saved to ..." message in my chat window and there is no new file anywhere on the system.

Any ideas what to do?

id check the hotkey for it in options and see if its set to a screen, theres 1 thing u could so, use print screen and paste into an empty bitmap image