Passing date parameter from Form to Query

[doma23]

Hello everyone,
I didn't use Access some time and now I'm struggling for couple of hours already with something that I used to know...

I need to pass the parameter (date) from a comboxes on a form to a query.

This is what I have in the query for particular date field:

IIf
([Forms]![frmOutput]![cboStartdate] Is Null 
Or [Forms]![frmOutput]![cboEnddate] Is Null;
[tblConsensus].[ReportDate];
[tblConsensus].[ReportDate] Between 
[Forms]![frmOutput]![cboStartdate] And 
[Forms]![frmOutput]![cboEndDate])

On the form I have a RUN command which the user should press after selecting StartDate and EndDate in the combobox.

The problem is that nothing is shown after pressing RUN button, although the date range exists.
It seems to me that there is a problem with the format of the date, maybe it's not adding ## signs, I dunno...

Help!!
Thanks!

[Narender Sagar]

Although your query is about two months old, but since I newly joined this group, I am wondering your issue is resolved or not. If you can attach sample database, may be I'll have a look into the issue in that.
regards
Sagar