Just look for it in the downloas section. what main anf Fs file are you using?...match it up to the same custom file in the download area. Also, why dont you just use the customise file in XS++? Also i think its not he custome files, cause if it were custome files your phone would say "conatct service provider" or something to that sort. Connection error or inactive siem is usually cause of mis matching of main and FS file, GDFS corrupt or (but unlikely) physical phone fault.