Hello,
im facing a problem with my blackberry curve 8520.
i upgraded yesterday my device software to v.5 and it worked well then i wanted to update the blackberry messenger to version 5, after i did so the blackberry messenger got deleted and i cant find it i tried many ways to install it its not working! i tried to downgrade the device to earlier version it doesnt want to either!

i seriously need help URGENTLY!

Thank you very much