ASP.net: weird url parameter when implment meta refresh on header

I was trying to implement Rick's adding meta refresh via header on this article

For some reason my url look like this

http://localhost/pickweb/(S(hp5mypqznxgquf45vzz4fi55))/Login.aspx

What is this "(S(hp5mypqznxgquf45vzz4fi55))" in my url? Even if i remove the code in Rick's blog it still have that weird parameter.

I implement Rick's code

Response.AppendHeader("Refresh", "4; url=profile.aspx");

in my Master page.

Jack

From stackoverflow

• Hmmm...I think I figure out where it come from. I think it's because my web.config have set session in InProc. Could that be the reason where that parameter come from.

• Looks like you are using cookieless sessions:

  http://msdn.microsoft.com/en-us/library/aa479314.aspx