Is it the same phone number you used before when you first bought it?
I thought you just restored the licence from within the bitesms settings.
What did it ask you for again?
Usually before all I would do is install it and it would automaticly recognize the phone number and set it to full access licence on its own when I first opened the app.
I purchased it a long time ago for $5. Tonight, I finally got biteSMS to install (cydia servers overloaded) and afterwards, went into biteSMS settings, and clicked Restore for getting my license restored. It took 5 minutes or so, but I eventually got a text message that said my license was a full license and I appear to be all set.
It's most likely due to Cydia's servers. Saurik tweeted something about issues with the payment/restore system.
Mine worked just by hitting the "restore" button
Thats weird, I emailed them with no response.
If you're transferring the license from a different device you'll have to to email them.