DBCOMBOS

I have 2 forms on the screen and the user can simultaneously work on 2 or more forms at a time. Both the forms have DbCombo's and a few textboxes. The DBCombo's are bound to a remote data control which connects to Oracle 7.3 database.
The following error occurs if the user works on 2 or more forms at a time:-
On the first form, the user presses the insert button and the data is inserted. After that, the DBCombo is refreshed to include the newly added data. Then the user goes to the second form and clicks on a DBCombo box and tries to select some data. At this point an error occurs "No open end cursor"

Can you help me?

Thanks in advance

Regards,
Ami Shah