DTC - major problem - please F1

[Deadline]

Hello..
I am trying to use 2 Recordset DTC and 2 ListBox DTC in Interdev, in the following fashion.

Whenever I update the first listbox, the second one should get populated(Kind of master-detail)

I followed the method given in

http://support.microsoft.com/support/kb/articles/q194/0/18.ASP

But whenever I use the following method

SUB Recordset1_ondatasetcomplete
	Listbox1_onchange
END SUB

I get the following error:

ADODB.Parameter error '800a0d5d' 

Application uses a value of the wrong type for the current operation. 

/asp/_ScriptLibrary/Recordset.ASP, line 609

If I remove that function, the program works, but it doesn't populate the second drop down box, when the page first loads. Otherwise it works fine..

Please suggest me a solution.. Thank you...
RR