LSMW idoc CRMXIF_ORDER_SAVE_M with 2 text files: Item is not getting created.

Hi experts

I am trying to create Opportunities using LSMW idoc  CRMXIF_ORDER_SAVE_M with 2 text  files(header and Item).Opportunity is getting created with Header but Item is not getting created.

Can you please provide me any pointer at this issue.

Thanks

Shaik