I receive photos via text message from people all the time. But whenever I try to send a photo attachment in my text, it just "loads" forever and won't actually send it!

I take a photo with the phone's camera. I navigate to the Gallery and select the photo. I select "Menu" - "Share" - "Messaging." I type in the person's name and click Send. Well, it's been 20 minutes so far and my photo message still has that envelope icon with the red clock, meaning it's still "sending." I had the same problem the only other time I tried to text a photo, and it never actually sent.

What's the deal? Please help!