Load data to flat table

Hi all,

I'm new in BW. I need to transfer data from file to flat table. On RSA1 I've created all necessary component: data store, info source, transfer structure and then I've created Info Object.

Under tab "External Data" the Preview is ok (I can see data get from file in correct columns).

When I try to Start load immediately I see the message "data was requested" but in corresponding flat table no data are stored. Under tab "Processing" I check "Data target only".

What missing for correct upload?

Thanks in advance

Federica