Coherence breaks OS X screensaver?

All,

I'm unsure as to why this is occurring - but I'm unable to start my OS X screensaver by using hot corners or by waiting for it to start (it's set to 3 minutes - I'll go to lunch and it still hasn't started). I need this so I can lock my laptop.

My theory is that Parallels (operating in coherence) is causing this problem. It doesn't happen EVERY time - but once the screensaver won't start - I have to kill parallels, open it again, then the screensaver will work (for a while - til it stops again).

Is anyone else having this problem?

Edit: Parallels 3.0 Build 5068
Leopard Version 10.5.4

Thanks!
Josh

 

Disable screensaver in Windows and check it

 

It's been disabled for a while now :/