first can you can you connect your phone with xs++? if you cant then you're going need to download the usb drivers which can be obtained from sony ericsson update service (the offical website). if you can then can you show me the log when you connect your phone to xs++?
have you read
Remove SIM-lock patch generator - Top Sony Forums
General Information about Patch-Unlocking (start here if you want to unlock) - Top Sony Forums
when you show me your log i will give you the instructions how to unlock it and debrand it.