C# - Response.Redirect Causes Download Of The Swf?

I have a flash image slider with a button below each image. When i press that button, the user is redirected to a new page where i add that image product to my cart. The problem is that after doing the adding, i want to redirect the user back to the initial page.

The code:

protected void Page_Load(object sender, EventArgs e)
{
addProductToBasket(getCategoryIdFromUrl(), getProductIdFromUrl());
Response.Redirect(Request.UrlReferrer.ToString());
}

note that in Firefox is working fine but in IE or Chrome it is DOWNLOADING the swf...If i comment Response.Redict(...) the user remains on this page so the click button is working well, only the redirect seems to be the problem.

Edit: The problem seems to be that Request.UrlReferrer keeps as link not the initial page containing the swf but the swf itself.

So, instead of doing redirect to:[URL] if does redirect to the swf contained on the Index.aspx page[URL]

Solved: with a session variable where i keep the initial page's url