purchase of coins

i still whether why i cannot purchase coins although i can login into the game using my passwword? And its shown this meaasage "this account is not valid for sandbow. please log in with a different account".... can any one tell me what to do.......

1. Goes in bug report.
2. If you have appsync through cydia, you need to uninstall it.

Be sure that the iTunes accoumt you are trying to buy coins with is the same iTunes acct you originally downloaded the app with.