all touchpad functions not working

i'm on the vista 2gb ram version and for some reason, the resize, and scrolling aren't working. i have had the pc for 3 days, and just installed the sp2 for vista. how can i get them to work again? the icon on the system tray shows that i am using the function, and when i chiralscroll, the cursor shows the circle thing, but doesn't scroll. same with the resize. the cross-arrow is visible, but no resizing is done. any suggestions or fixes?

edit*
the only way i found to regain those functions was to roll back driver and update driver from the internet...which was the same driver set.
at least this may help others with the same problem i just didn't like not having the quick scroll function

 

Glad you found solution. Where I read through your question first I thought about was driver update

 

day two. it just happened again. the icon in corner says function is being used, but not action. i don't think the solution is roll back driver and update every day.