multiple tables in ALV

Hi,

I want to print the report in ALV format. Here i am fetching the data from 4 database tables, and passing in one internal table. I want to print the report using that one internal table. But the problem is every time it is giving me an error as the internal table is not in the outtab format.

I tried using the same program to print with one DB table and one ITab, it works.

The report is printing data in normal report form also.

How to call the same report using ALV grid.

pls help.

simi