nokia 6101 restriction code...HELP!

hey, can anyone help me?? i have a nokia 6101 locked on the t-mobile network, and i need to use it on the o2 network. its IMEI is 357961/00/621680/0 thanks in advance!!

 

UK?

 

yeah, uk

 

ENTER CODE WITH OUT SPACES
Remove sim first, press #
Press * 3 times fast for (p)
Press * 4 times fast for (w)
Press * 2 times fast for (+)
Verify code before pressing the last #.

#pw+786 730 500 467 552+7#

 

it now comes up with the message 'cannot undo restriction'. what does this mean?

 

When you have seen the message (Can Not Undo Restriction) or (Not Allowed), it means one of the following:
You entered 5 or more wrong codes into your phone. Some models only allow 3 chances.

 

so it cannot be unlocked?