Shutter button doesnt fire shutter anymore.

So, my shutter button on my camera autofocuses and locks on, but it doesnt fire anymore. the shutter button on the battery grip fires it everytime however.

any ideas?

Have you tried it without the grip on? Might as well rule out any weird compatability issue with the two.

Use canned air and blow around the shutter button vigorously, might help if there is some gunk underneath.
Take out battery first.

i unscrewed the battery grip as much as i could (the handstrap is too much of a pain to take off) and turned it off, and it still wouldnt fire. i'll try the canned air idea soon. thanks guys.

Well. The shutter works again, but it didnt work for a good 2 days or so, weird. i think im going to run it over to canon sometime this week to get it checked out anyways.