MPX 200 frequency problem
 

For some reason my MPX 200 does not want to work in Bosnia(got it from USA) , it is unlocked and accsept sim card and I have changed frequency on 900/1800 and still does not get reception at all .
i have also tried automatic seraching but still the same .
Any sugestions would be helpfull.
Thank in advance and sorry for bad english.
Ceers