Blackberry 8320 Curve

I have been handed a used curve that was using 4.2 operating system and I attempted to use the canera app only to get the following eror message could not start the camera close other apps and try opening the canera again.
So I figured that the O/S was due for and update so proceeded to do just that Now the phone is at 4.5 after downloading and installing it and getting configured the way I want to have it But still when I go too the camera app it errors out with the same error message please close all other apps a try again when I use the bberry I have 10mb of free file space no media card installed but with that much free memory space availanle surely there should be enough space for me to take a picture any help or suggestion will be greatly appreciated

Thanks
Chad Cook