Adobe Photoshop 7.0 Question

Okay, so yesturday I uploaded a crap load of brushes in Photoshop. I closed Photoshop cos I was done making my little graphic. Today, I opened up photoshop and all my brushes are gone!!! This has happened before and I have no idea why. Is there a maximum amount of brushes you can upload? Because I was thinking that maybe I uploaded too many and that's why they're all gone. Can someone please help? THANKYOU!

edit: problem solved! :)