mobile

I have an HTC desire HD and its bootloader is not unlocking. I tried the HTC unlock method but the phone does not give any token, it gives an error. so im stuck with the locked hboot and cant flash a custom rom :(

Is there any way to unlock the bootloader with HTC DEV plz tell me. I read about a software named Simon's unlock utility but i cant find it online..... can any one give my a link to this or anyb other software like this. OR does anyone know a way to unlock bootloader or flash Hboot without unlock... plz tell me guys...