sieempi, sorry for ranting about my darn phone not unlocking before. it turns out i was checking it with old sim card type which has larger chip so desire couldn't recognize it (but it works in my other nokia - because of it i never thought sim card could be the issue
). and as sim slot in desire is covered i couldn't see the difference and spot the issue.
it turns out your tool worked like a charm! thx, i'll be paypalling you some mead as soon as i can.
maybe this'll help few others who can't get the unlock. my symptom with old card was "no sim card" message, i.e. it wasn't recognized at all, like i haven't put anything in the phone.