What error you are receiving when you call the BAPI BAPI_GOODSMVT_CREATE?
OR you may try to change the date format, I mean before calling the BAPI please use the below code
data WA_BUDAT(10).
WRITE BSEG-BUDAT TO WA_BUDAT.
Please let us know if you are facing issue still.
Regards,
Vadamalai A.