dblookupcombobox

[KLBADBOY]

Hi
I'm newbie to Delphi
I'm using Delphi 7.0
I got 2 dblookupcombobox.
Table 1 is Category.
Table 2 is Subcategory.
Table 2 got Category_ID.
My data is.


Category Table
Category_ID Description
1 ....
2 ....


Subcategory Table
Subcategory_ID Category_ID Description
1 1 ....
2 1 ....
3 2 ....
4 2 ....

The problem is When I click next button..

It ok.
CATEGORY_ID show SUBCATEGORY_ID correctly.
But when the CATEGORY_ID data move from 1 To 2.
Its do want to show SUBCATEGORY_ID.but the SUBCATEGORY_ID is there. But just don't display.
When I start from CATEGORY_ID 2 To 1 Same.
Fisrt display correcly.But After that problem.
Can anyone Can help me please.
Thank you in advanced.