Problem with BAPI_MATERIAL_SAVEDATA through ITS

HI All,

I am using BAPI_MATERIAL_SAVEDATA to extend material for the Sales organisation and distribution channel. When I use it in a Module pool program it is working properly, however if i use it in ITS program it is returning an ERROR. After executing that BAPI I have used COMMIT WORK even then it is not working.

can any one help me in solving this issue and please reoply as soon as possible.