isnull [Label].visible=false not working-- need loop?

[factotum]

I have a report that has the labels in a group heading but the containers in the details section. This way, I'm not repeating the Labels with every record.

The records returned in can vary from

null

to Many. I have the Labels set up to not be visible when

null

using:

 If not isnull([Field]) then
      me![FieldLabel].Visible = true
 Else
      me![FieldLabel].Visible = false
 Endif

However, if the first returned record is null, but the second one isn't, the labels disappear. Not really the effect I was after.

Any one know how to cycle through the returned records to ensure that they are all null before setting the visibility to false. Thanks.

=D