changing text in report at runtime

I have a form which allows the user to select the report selection criterea and then display the report.

This part works fine. I would like, however, to have a text box on the report which shows the selection critera.

I wrote the following test:

VB Code:

DoCmd.OpenReport "test", acViewPreview
Reports!test!txtcriterea.Value = "a test"

This works, but the txtcriterea text box is in the page header and only shows the value "a test" from the 2nd page on. If I put it in the report header, it doesn't show at all. Also, if swap the lines of code, so that I set the value before showing the report, I get an error saying that the report either does not exist or is not open!

Please help.

Francis