Unable to insert records in a subpage

Hi everyone,

I created two custom tables: Table 1 with key : field1 integer
Table 2 with key : field1,field2 where field2 is also integer 
and two pages:
Page1 is based on Table 1, Page2(subpage of type ListPart) is based on table2 with the following properties:
MultipleNewLines = Yes, AutoSplitKey=yes, DelayedInsert=No
The problem is that I can't insert records from the subpage.

What shall I change to make it possible?

Thanks in advance :mrgreen: