DYNPRO_SEND_IN_BACKGROUND in RFC

Hi,

I am getting error "DYNPRO_SEND_IN_BACKGROUND"

when i am trying to process RFC and My RFC has a submit

statement to another program which has i has a

"BDC SESSION" for VL02N.

I am invoking my RFC from Mercator.

FUNCTION ysd_rfc

SUBMIT yaa_sd_001

WITH p_file EQ file_name

WITH p_dir EQ dir_name

AND RETURN.

END FUNCTION.

Thanks

Ram