pb with TDBLOOKUPCOMBOBOX

hello,

I try to use the component "TDBLOOKUPCOMBOBOX" with a BD whose
recordings are control by an other BD

When I change recording  of the  BD master the component
"TDBLOOKUPCOMBOBOX" fact in general planted the program

Someone would it have an idea on the cause of the fail ?

Many thanks.

nim...@{*word*104}gal.com