Problem with Cumulative Output in a query with BI 7.0

Hi, I have a problem with a query doesn't work on BI 7.0 but works correctly with BW 3.1.

0CALMONTH has the property CUMULATIVE OUTPUT checked,

in BW 3.1 the query works, but in BI 7.1 it doesn't work, when I refresh the query, it goes in time out.

This query has a lot of records, if I filter for few records, query goes fine, but else no...

Could anyone help me?!

thanks

Fede