Outbound rule stops working after postback

Hello,

I have an outbound rule which rewrites URLs contained in all the hyperlinks on a page. The rewrite is ok (I can see the rewritten URLs when viewing source, using firebug, ...), but when I click a submit asp:button and makes a page Postback, all the hyperlink URLs in the page (the same hyperlinks where the rule previously worked) return to the format not rewritten as if the outbound rule did not exist or not work. If I refresh the page, the outbound rules returns to work.

I have no idea what has been failing. Someone who can give me a hint?

I have no problem with the address bar url, as I'm using form.Action = Request.RawUrl the url in the address bar mantains the rewritten format after postback, the problem is with the hyperlinks URLs in the page.

I'm using .net 3.5

Thank you very much!