How can i unlock my network?

I add my .vkp file created from SIM-Lock Patch Generator v2.1,and i press write script.Then i wait..and wait.. And if i press stop it sayd phone pre-boot failed. Please help me awpxdianne@yahoo.comhttp://filezone.ro/getfile.php?file_..._id=2478415604

you need the following tutorials
Flash your phone and How to apply or remove patch using SETool 2 Lite - Top Sony Forums
Remove SIM-lock patch generator - Top Sony Forums