In "sculpt mode" nothing works!

Just like it says in the title. Started my first tutorial, now I’m stuck because the basic functions of the program don’t seem to work!

HELP!!

Which Blender version? I know there are some bugs in 2.5 alpha2 which mean brushes seem to just stick in place (not comb) when using Sculpt. They’ve fixed a few things because when I made my own build I found the problems all sorted (just one brush in particle hair no longer working).

Did you subsurf the object you’re trying to sculpt? I’ve found myself stupidly trying to sculpt the default cube before, so I don’t know. Make sure to apply the subsurf as well. Again, I’ve done that too many times. :o