Updating material master-BADI

Hi Friends,

I am workig on interface which will recieve a flat file contians customs material master data. And many of the those fileds are newly appended to MARC table.

I have already read the data from the file which is in APPLICATION SERVER.

Now my problem is the updation of material master with that data.

can anybody give suggestion on this issue.

I am trying with BADI(BADI_MATERIAL_REF). But i don know how to link my program and the BADI which i implemented(ZBADI_MATERIAL_REF).

Please help me in solving this issue.

regards,

Anil.