Unable to download MMS messages

[o2bnclemson]

I have a non-rooted HTC Thunderbolt and am using Go MMS Pro. Every now and then I will receive a large text message that will initially show up as a multi-media file. I'm always able to load it. Today I received one that is 2KB that I simply cannot load. I've tried it in the stock app (it just stuck at Loading..... for several minutes), tried clearing the cache, increased the permitted size of multi-media files, made sure the Auto-Retrieve option was checked in both the stock and in Go MMS Pro. No luck with anything.

Any ideas? Very frustrating!