BB Curve :: Can't Compose Email, Forward Emails Or Pictures

my Blackberry Curve 8530 CANNOT compose new emails: it can reply to emails that people have sent me, it can compose emails to people whose emails I already have saved, yet if I try to "Compose Email" and enter a new address, it can only "Save Draft." Not only that, I can't email or MMS any of my photos either-- either TO a new email, or a preexisting contact/email--the only way to get them off of my phone is if I "send to Facebook," or copy them to my computer using a micro-USB cord.A battery pull has NOT worked. I've also already come across people posting on other sites about the same problem (and there seems to be a similar issue with the 8520). I've come across other websites suggesting that the problem may be to an issue with the OS (I'm currently on v5.0.0.654 Bundle 1108, Platform 4.2.0.298; I certainly haven't downloaded/installed any new Apps since this happened), and that downgrading/changing to a different OS may be necessary to fix/troubleshoot the issue, I just don't recall which website that was, nor do I know how to change the OS on my own (if I remember correctly, it just updates itself automatically, which probably would explain why this seemed to happen out of the blue).