Transport fails during import

Hello

While importing communication strcture & infosource ZMM_0CUST_SALES_ATTR

we got error 8 saying "There is no DataSource with these attributes

Reference to transfer structure 80CUST_SALESM_AA not available.

No activation possible."

Then we have included the data source and again tried to import it

but got the same error. Following are objects in transport.

Communication structure : ZMM_0CUST_SALES_ATTR

InfoSource transaction data : ZMM_0CUST_SALES_ATTR

Transfer structure : 80CUST_SALESM_AA

DataSource (Active Version) : 80CUST_SALESM

Thanks

Sundar