Query String. How to create it?

[shapper]

Hello,

I have a control where MyControl.NavigateUrl =
"~/RSS.ashx?Channel=News&Culture=pt-PT".

When I preview the web page the hyperlink becomes:

"...RSS.ashx"

The Channel and Culture just disappeared.

I tried many combinations and I allways get a truncate Query String
somewhere in it.

Could somebody tell me what is going on here and how to solve this?

Should I change something in my Web.Config?

Thanks,

Miguel