[blackberry lady]

Hi everyone. I have another odd issue that has just happened for the 2nd time on my blackberry curve 8310. While my profile is set to normal, I do not receive a tone for any of my 3 email accounts nor my text messages. The phone ring still sounds however. This happened over the weekend for about a day, but then mysteriously resolved itself. It just happened again this morning and I just don't know what might be causing it. Has anyone ever experienced this? Thanks everyone.