ASP 301 Redirect and Mozilla Firefox

[iShopHQ]

So I load FireFox to check my various sites and see how they do. Format-wise, they are OK, but I noticed that my 301 redirects don't work.

<%
Response.Status = "301 Moved Permanently"
Response.addheader "Location", "http://www.BlahBlahBlah.com/blah/ifront.asp"
%>

Regular redirects work:
Response.Redirect("http://www.BlahBlahBlah.com/blah/ifront.asp")

Any suggestions?