Sorry for the double post, but the title on the first post got garbled for some reason (I'm posting from my Treo). Here it is again.

Since Thursday 3/17/05 I've been getting the following error message when trying to send a text message on my ATT/Cingular Treo 600 from Texas to California (same Texas area code on both phones), 'The network is not responding now, or the message center number is invalid.'. I just spent an hour with Cingular tech support and they were able to send me a test message, but I can't send out. Anyone else having text message problems on their network?