trackpad gesture not working

hello, i appear to have a problem with 2 finger scrolling, can do all the other gestures no problem at all. i have a new macbook and have migrated my data over from my ibook g4, apart from this it all works great and i luv it.
i need this scroll thing as its a pain in the *** moving the cursor over to the scroll bar all the time.
cheers

See if any of these solutions help.
Macsimum News - MacOSG: Trackpad problems with new MacBooks (Late 2008)