Text notification changes on it's own
 

I just got a new PPC-6700 from Sprint yesterday off an insurance claim. I installed my 6.1 ROM with all the same programs I had on my previous 6700, except I'm having a problem that I didn't have on my old phone. I have Photo Contacts Pro installed, except I'm using the phones native alert system for the SMS. I have the 'Display Message On Screen' or whatever button checked, but every 30 minutes or so, that box will uncheck on it's own. I thought maybe it was the Photo Contacts, but like I said, I had it installed on my old 6700 and I didn't have that problem. Anyone have any advice? It's really annoying having to go into the settings and check the box all the time.