Presentation variable passing in URL possible?

Hi,

I have following Requirement:
I have a presentation variable named "zzCurrency" in a Dashboard prompt on the first page of a Dashboard and many pages in the Dashboard.
This variable is shown in the next pages and it works perfectly if I click on the next page

Because there are so many pages i want to add a Navigation on the first page and add Hyperlinks to other pages.

https://secure-ausomxXXX.crmondemand.com/OnDemand/user/analytics/saw.dll?Dashboard&PortalPath=PathandDashboardName&Page=Page2

Now Comes the Problem.
The presentation variable from the first page is not passed to the 2nd page in that case.