Passing data to new form using open args

[fsuds]

I'm having trouble figuring out what I need to do here. Basically, I
want to pull data from several different tables and send them to a form
using open args. However, the form that is being fed need to have
certain columns of data concatenated and displayed in combo boxes. The text
boxes receive and display the correct data but my combo boxes remain blank.

Here is the code from my search form to feed the rental edit:

sSQL = "Select RENTAL.[RID], RENTAL.[EVENTID], EVENT.[NAME]," & _
" EVENT.[FILENUMBER], RENTAL.[RENTALDATE], RENTALITEM.[RENTALID],"
& _
" RENTAL.[RENTALITEM], RENTAL.[RENTALTYPE]," & _
" RENTAL.[PRICEPERUNIT], RENTAL.[QUANTITY]" & _
" FROM RENTALITEM, RENTAL, EVENT" & _
" WHERE forms![frmRentalSearch].[RID] = RENTAL.[RID]"


DoCmd.OpenForm "frmEditRental", acNormal, OpenArgs:=sSQL

Here is the code for my 2 combo boxes on the edit form:

frmEditRental


cmbEVENT: SELECT ([RENTAL].[EventID]) & ", " & nz([EVENT].[Name]) & ",
" & nz([EVENT].[FILENUMBER]) AS Expr1
FROM EVENT INNER JOIN RENTAL ON [EVENT].[EVENTID]=[RENTAL].[EventID];


cmbPrice: SELECT [RENTALITEM].[RentalID], ([RENTAL.RENTALITEM]) & ", "
& ([RENTAL].[RENTALTYPE]) & ", " & ([RENTAL].[PRICEPERUNIT]) AS Expr1
FROM RENTAL INNER JOIN RENTALITEM ON
[RENTAL].[RentalID]=[RENTALITEM].[RentalID];


txtRentalDate: RentalDate
txtRID: RID
txtQuantity: Quantity


I also have a similar form setup for data entry and can select data through
the combo box but when I save the record, not all of the information is saved
in the table.

I'm absolutley stuck. All help is greatly appreciated.