datacombo which source is ADO

I used a ADO control using connection string. I also created a datacombo and used this ado as it datasource.
In my devepment PC, when I click on this datacombo control, I can see a list of info drop down. But when I try it in other PC, the drop down is empty. Anyone has any idea ? Really, really need some help on this.

to anyone who's reading my earlier post:

I solved my own problem already. Incase you have the same problem, just download and install the latest service pack from microsoft, which in this case I downloaded sp4 and it solve my problem. Special thanks to the one who mentioned the sp in one of the post.