Passing Parameter via UR

Hi, 

I would like to pass parameter via URL, 

When I try this: 

="http://hrslimo/ReportServer/Pages/ReportViewer.aspx?%2FHermanReports%2FOpenClinicVisitsByTotalAgingDetails&servicetype=" & Parameters!servicetype.Value

it opens a URL

But when I try this :

="http://hrwobsql04/ReportServer/Pages/ReportViewer.aspx?%2FHermanReports%2FOpenClinicVisitsByTotalAgingDetails&servicetype=" & Parameters!servicetype.Value & "&VisitStatus=" & Parameters!servicetype.Value 

It doesn't open any url

I'm just interested in opening the URL I will fix other errors. 

Thanks

It doesn't