styles not working when using asp.net routing

Hi,

I would like to create a rounded corner panel and I used for this some codes such as radius-border=15px.. but that would not work with IE6,7 and don't know which versions neither with slimbrowser so I used the  css3 pie and I placed the Pie.htc file in my project and called it with style="behavior:url(path/Pie.htc).. and it worked on IE and slim browser but when I call a page that is routed which means does not really exist but points to a certain page the panel is not rounded corner anymore, I thought that I should place the file in the styles folder but that did not work too, what should I do and what's the reason of this?

thanks.