HTC touch pro unlocking issues

[wabe73]

i tried every thing
am trying to unlock my Htc touch pro 7272 ( sim -unlock) to another opreator in my country
it is working fine with 3 cariers here in sweden but not with one i like i have the unlocking code for my phone but. but .but how do i enter the code as i never recive the " enter code message " when i use a new sim card but i just can not make or recive calles i trid to activate the network but no succes
what should i do i realy like this phone and i dont wont to change my number and my phone company...