Hyperlink Filter not working

Hello,

On a report printing general ledger entries, I want to make the Entry No. column a link to page 20 filtering on the entry number
I enabled Hyperlink in the report and without filter it works ( ="dynamicsnav://///runpage?page=20")

But as soon as I try to filter the Entry No. column does not work as a link
So I suppose that my link is bad - here's the expression I used in Property - action - Go To URL :

="dynamicsnav://///runpage?page=20&$filter='Entry No.'%20IS%20'" + Fields!Entry_No.Value + "'"

I can't see whats going wrong - can anybody help me ?

Bye - Gustav