User Friendly Url In asp.net Using IIS Not Working

In userFriendly Url In IIS When I m trying to remove aspx page And just Write My QueryString Name That is not Working.
Example :http://tirthak/product.aspx?title=Hair-Care
This Is My Url I made it User Friendly Just Like below
http://tirthak/product/Hair-Care
It is working Properly.
When I m Trying to do this "http://tirthak/Hair-Care"
It is not Working Please Help Its Urgent. .
"HAIR CARE" is category and using this name i bound products Its an Query String Value.

Thanks,
Tirthak Shah