Problem in url mapping

Hi sir,
     I developed one web application in that application, i am using url mapping, but i cant able to get
the desired url in the browser, it shows the old url but not the mapped url. I am sharing the code
for your reference. Kindly give me the solution for this problem.


[Note: I am using framework 2.0 only ]



mappedUrl="~/Default.aspx?category=default" />
mappedUrl="~/Default.aspx?category=software" />



I have Default.aspx in my project but not having Category.aspx. I am new to this urlmapping concept.
Kindly give me the solution for this problem.