Handcent app isn't sending pictures?

I have the Droid Incredible, and Handcent is my preferred choice of texting, I love it. But lately, since last week, it hasn't been sending any pictures. Every time I attempt to send something to someone, they say they never get it. I even tried stock messaging and it still didn't work. And I toyed with the maximum size as well, still didn't work. And I'm on 3G and my mobile network connection is on, and my Wifi isn't on, either. And if anything, I have a 5000 msg long thread that I'm in the process of deleting, if that may be the case. I really don't know what's happened with my phone but I'm really getting frustrated with this problem...if ANYONE knows how to fix this, I'd really appreciate it.