ah ok, consider yourself lucky, because quite a few users used the .1540. firmwares, and were unable to get unlocked again
now just flash TWRP 188.8.131.52 and install the ROM of your choice, here is some more detailed info: http://forum.xda-developers.com/show...2&postcount=21
Should I change to "TWEP" by "adb sideload" with "CWM"? Because I can't switch it with "adb reboot bootloader" and "fastboot flash recovery recovery.img" in bootloader or fastboot.
Thank you a lot.