In that case I like to suggest you to unbrick the cellphone (restore again to FROYO) and test the cellphone... If you do it, you will loose the root, however the unlock will remains
You can re-root the cellphone later... the issue could be also...
i just tested the unlock way for the Infuse on a friend's AT&T Note (i717) and it worked pretty the same..
the only way to errase all the information from the INTERNAL SD, is going into CWM, advanced options, erase or delete all the information with the options on there :)