I'm not familiar with your device, but you should be able to reprogram in the MEID, it's under your battery on a sticker. The MIN might also be there, if not on the box the phone came with. If you do not have the box, contact your carrier and ask for it. You should be able to reprogram it back in via the phone or you might have to use QPST. There should be a few guides around the internet, but a lot of them deal with phone cloning, which we won't allow links to on these forums.
You probably got your IDs reset after flashing a particular ROM. This isn't the first time that I've heard of it, but it is rare.