Problem with MapPageRoute

Hi,
I have a contact.aspx page. I am able to go to it using this url:
http://www.JassimRahma.com/contact.aspx
but when I use this url it doesn't work:
http://www.JassimRahma.com/contact
I don't know why it's going to the message.aspx?
while other MapPageRoute works like home, news, etc
here is my global.asax:
routes.MapPageRoute("jassim_rahma_contact", "contact", "~/contact.aspx");
and I don't have anything in my Page_Load in contact.aspx.

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