dear youngblt it is happening because by default in your iis server the default page is set
to default.htm for you portal site.here is the solution
1.click on start click run type inetmgr to open iis manager
2.>then Websites
3.>select your portalsite from the list
4.>right click then properties
5.>select documents tab
6.>you will see default.htm up on the list
7.>click default.htm and then move it below default.aspx
thanks
Umer Jamil