Asset Description missing from Asset dropdown in AS03

Hi

I'm using fm BAPI_FIXEDASSET_CREATE1 to create assets and everything works fine except that those I've created don't have an Asset Description in the dropdown for AS03 - ie table ANLA field MCOA1 is blank. I can't find any way of filling this field in the import or tables parameters of the function module.

Does anyone have any suggestion as to how I can fill this field?

Thanks

Brigitte