Can't delete text message from outbox

[mrluk]

I have the mogul and I have a text message that is "stuck" in the outbox. I cannot delete it. It looks like it is a draft message because the icon shows an unopened envelope with a pencil. To make things worst, my phone keeps sending this message every few hours or so to annoy the receiver. Any ideas? Is there a place in windows or the registry to remove this message?