Photoshop Help

Here's the deal. I made a brush set for PSCS2 and it works great except that it doesn't show a preview of the brush when I'm trying to use it. It shows a crosshair instead. Does anyone know how to fix this. If you want to see the brush set go here

It's really irritating and if anyone could help that would be great.

EDIT: This also just started happening.





I can't use some of my filters. Anyone know why?