can not re-direct to mobile pages

To whom it may concern,

when I browse to my home page
from my Pocket PC (AT&T tilt using Windows Mobile 6.0)
I do not get re-directed to my mobile page.

I am able to do it at home with my server. I wonder if
your browsecaps section in the machine.config
of your server does not support Pocket IE..

According to msdn
(http://msdn2.microsoft.com/en-us/library/fhhycabe(VS.71).aspx), I use this code, but
it does not work on your server:

public void Page_Load(Object sender, EventArgs e)
{
if (Request.Browser["IsMobileDevice"] == "true" )
{
Response.Redirect("MobileDefault.aspx");
}
else
{
Response.Redirect("DesktopDefault.aspx");
}

}

Thanks in advance,

Carlos.