Problem creating a datablock with columns from 2 tables...

Hello guys, i have a problem in creating a datablock with columns from 2 different tables. I try to create the datalock manually and in the Query Data Source Type Property i choose FROM clause query, and in the query data source name property i type my sql statement with the columns i want to display.After that i place the items that the datablock will contain , manually from the painter. However , when i run the application, the datablock doesn't display the items from the database. Am i doing something wrong?
Thanx in advance,
Regards,
Bill.

Never mind Peter, I found the error. I forgot to make execute_query for the datablock, so this was the reason why the items weren't displayed to me.
Thanx anyway a lot for your advices and your time you spent !

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