WT Model Changed on 15.01.2012, not able to save entries in IT 0008

Hi

I am not able to save entries in IT 0008, while trying to save the entires in PA30 getting a message Wagetype model changed on 15.01.2012 and also WT amount are multiplying with working hours per period. .

Have maintained all the tables T510, T511, T512Z etc., and also have checked in the table V_ 503_ALL and V_001P_ALL   

Please guide me, how to rectify the same.

Regards

Shaik Fareed