Add link to Render report to Excel 2010

Hi, i have looked through different posts, but i still cannot get this to work, time to ask for some help

my script

http://Main.reports.sub/Reports/Pages/Report.aspx?ItemPath=%2fHome%2fMyHome%2fMyKPIrs:Command=Render&rs:Format=Excel

Instead of opening Excel this reopens the report on the report server,

here is where i started from, and i changed my script to sut this but still no luck, any help would be appreciated

="http://vyof1884200/ReportServer$youhoo?/My+Adventure+Works/Product+Sales+and+Profitability+by+Month&rs:Command=Render&rs:Format=excel"

David