To check memory, try alt-cap-H..... Works on my 8700g and may on the 8703e, but don't know. Otherwise, go options > status. In either case, look at file free.

P.S. Doesn't looke to me like you are overloaded on apps. And you don't keep emails much to speak of. I'll be surprised if you have memory issues. But who knows.

P.S.S You are on BES, you said? Could that somehow be a factor? Don't know. Just asking? What does IT say?