c2105 unlock error

35961***********_Sony_C2105_15_3_A_1_17_Wed Mar 26 005055 CST 2014 (2).skb
file to support@sigmakey.com
Data checksum error

set c2105 come for monkey virus

i flash it now it show invalid card

when try unlock it show this error

also tried 4-5 different flash file version but error always same

set imei and BB ok

in service mene show this

[ ] Network 0
[ ]Network Subset 0
[ ]Service Provider 0
[ ]Corporate 0
[ ]SIM 0

anybody guide me for repair my phone plz