you need cdc drivers too all thinks links are in below
1. Install "Maui META 3G Tool" on your PC
2. Open it.
3. Click "Options ↦ Connect Smart phone into META mode"
4. Click on Reconnect button
5. Switch off your phone
6. Connect via USB Cable
7. Change "Get Version" to "IMEI Download"
8. Click "Change NVRAM Database file"
9. Download & extract "NV Ram Database Files.rar"
10. Select "BPLGUInfoCustomAppSrcP_MT6582_S00_MOLY_WR8_W1315_ MD_WG_MP_V5_1_wg_n"
11. Type both IMEI numbers
12. Click "Download to flash"
13. Click "Upload from flash"
14. Close the IMEI Download Tab
15. Disconnect
16. Switch on the phone.
MAUI META 3G :-- download
CDC DRIVER :- DOWNLOAD
THANX TO XDA