1)Your radio is not compatible with coke2.31 unlockerTry to upgrade flashing OFFICIAL Sprint or Bell ROM from SD. It also might fix your "pins" issue.
If its not going through try flash OFFICIAL ROM via cable...
2)coke 2.31 instructed to disconnect and reconnect cable at certain step of unlocking process,otherwise it will be bricked (Imcokeman have dead vogue and mogul to prove it).
So when phone on multicoloured screen and connected to computer -does the screen showing word "serial" or "USB"?
If "serial"-there is nothing you can do except to buy new cable and try again.
If you see word "USB" and activesync4.5 installed on your PC (preferrably windows XP)-your LAST AND NOT RECOMMENDED option is to try this:
http://forum.ppcgeeks.com/showpost.p...&postcount=396
And,of course,Try it at your own risk....