Direct Payment (Cash) option in takepos showing error

Hii Everybody,
I have been using doliwamp for past 6 months and everything was going fine until doliwamp has stopped working completely. After that I uninstalled my old instance, reinstalled a fresh instance and restored from last week sqldump file I have backed up. Now my takepos module direct cash option shows error " Field ‘Bank Account’ is required ". Normal Payment works fine and direct cash throws error. Can anybody suggest a solution.