I have had so much trouble installing Linux on my laptop, I am praising Microsoft.... LOL

OK the error

Kernal panic - not syncing: VFS: Unable to mount root fs on unknown-block (3,3)

How do I get past this error?
I have dual boot with XP on one partitition (which was the original OS)
Laptop Toshiba Satellite L25 - S1192 model psl2xu-00q00p

NOTE: Windows partition boots and works OK

I hope I can get this installed soon, I have a class project to do a small webpage on a webserver.

-thanks
-doowopdj