BB Curve :: 8530 Disconnects From Wireless Network?

I originally put this in another forum before I realized my error. Sorry about that.Anyway, my 8530 often disconnects from my wireless network during the night.Stats:Using Curve 8530, plugged in overnight so it's not a power problem,Free application memory = 94 megs,Software = 5.0 Bundle 1638

Mobile Network = Bell Mobililty (Canadian network) {100% for sure it's not a network problem - others who are on the same network but use a different phone do not experience this problem),Network selection mode = automatic ,Auto on/off = disabled ,Bedside mode = on or off, makes no difference

I cannot have it disconnecting from the network overnight. If there's not a fix, just let me know and I'll use the Curve as a doorstop and get a phone that works.