ive never had good luck with doing it this way, never works, or if your flashing between roms, usually have some sort of corruption.
I would suggest pim backup
http://forum.xda-developers.com/showthread.php?t=299705 if your on windows 6.1 and microsoft myphone if your on 6.5
For pimbackup, make sure you put the phone into airplane mode before you restore.