Losing right click ability at random?

I have a 17" macbook pro (which I love) but of late one of the things driving me crazy is that sometimes (usually after I haven't rebooted in days) I lose the ability to right click. (two finger tap). As soon as I reboot the problem goes away, until it pops up again. Anyone else have this problem and more importantly know how to fix it so that it stops this craziness???

 

It's my one really complaint about the machine but it is freakishly annoying having to reboot just to be able to right click :|

 

hmmm, I will have to check that out next time it happens. Something else I noticed too, if I continue using the laptop without rebooting when I have right-click issues it won't let me enter text into fields anymore anyone else have that issue?