UPDATE: I solved this by calling the combo's Requery() after updating the Rowsource

I've been struggling too long with what should be a simple thing, hope someone can see what I am missing.

I've got a form with typical VCR navigation buttons on it. On one of the pages I display a dropdown list that has all the Receipts for the currently selected Invoice. Each time the user navigates to a new invoice the list of receipts is built up (if no receipts exist, then a blank record gets added to the c_paymentslist cursor and then the dropdown's refresh is called. In the refresh is this code:

LOCAL lnRecCount, loAlias, loRecno

m.loAlias = CREATEOBJECT("cusPushPopAlias")
SELECT (thisform.iobomgr.oBO_Payment.oDS_Payments.icAlias)
m.loRecNo = CREATEOBJECT("cusPushPopRecno")

m.lnRecCount = RECCOUNT(thisform.iobomgr.oBO_Payment.oDS_Payments.icAlias)
RELEASE m.loRecNo

IF m.lnRecCount > 0
	this.Enabled = .T.
	this.Value = c_payment.iPaymentId	&&creceiptno
ELSE
	this.Value = ""
	this.Enabled = .F.
ENDIF

RELEASE loAlias

The dropdown list is configured with these values:

Rowsource = "c_paymentslist.creceiptno,ipaymentid"
RowSourceType = 6 && Fields

The problem arises if I display one Invoice which has no receipt, then move to an invoice that has a receipt. One the invoice with no receipt, the dropdown's value is set to blank and then disabled. This is fine. When I move to the next Invoice which has a receipt, the dropdown is enabled and its value is set correctly, but the value displayed in the dropdown list is blank. It should be displaying the Receipt Number.

Can anybody see what I am doing wrong?