BDC data field problem

Hi,

i done one bdc program converted into FM .then i need to upload excel and get values into one internal table then i have to pass internal table input for my FUNCTION MODULE which contain bdc recording codes

the probelm is when pass data direclty from fm i can get output but when i pass data through excel the tables in Fm have data from excel but if i try to display one field from table it is not showing values .