Flashed back to complete stock, MMS still not working?

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http://forum.xda-developers.com – So recently I decided to try out a custom Android firmware for the first time ever on my Virgin Mobile SPH-D710. I ended up going with CyanogenMod: Wild for the Night (found here: http://forum.xda-developers.com/show....php?t=2099881) After following all instructions, I got it working correctly. However, MMS did not work. This seemed to be a common problem among other users of the mod, and there were MMS fixes available. I tried all of the MMS fixes that I could find, and none worked for me. Just today, I decided that I've had enough of not being able to send or receive MMS messages (HowTos)