Photoshop Problem...

I'm usin Photoshop cs3. It was workin good for a while, then it wouldn't open because it said something about "VerionCude.dll" not being able to be found. So, I looked in all of tha Photoshop folders on my computer, and I found that i have "VersionCue.dll", but it wasn't in the right folder. So, I put it in the right folder and it worked like normal again. But now, when I try to save or open a file, it says "The paging is too small to complete this operation: C:/whatever/whatever/whatever/VersionCue.dll", and then it just closes out Photoshop. WHAT'S WRONG???