Default P769 + CM11 + Sim Unlock Code not working :(

Does anyone know if having an unlocked bootloader and CM11 on their P769 causes T-Mobile's SIM unlock code to not work? I have tried the code that T-Mobile provided me 2 time and failed both time. I don't want to brick the phone. Waiting on them to call me back today about this issue. Also the code was emailed to me back on July 7th and I tried it for the first time yesterday. Do these codes expire? Thank You in advance for any help.

Update: I figured it out!
For anyone who is wanting to SIM Network Unlock their L9 that is running a custom ROM here are the steps:

1.) Backup you custom ROM in recovery.

2.) Flash a stock ROM in recovery.

3.) Enter the unlock code after booting the device.

4.) Restore your custom ROM in recovery.

Get your stock ROM CWM backup from here: http://forum.xda-developers.com/show....php?t=2136204

***Remember to unzip the CWM backup to /storage/sdcard0/clockworkmod/backup/ or wherever Clockworkmod stores its "backup" folder.***