Integral mode Rewritepath and IIS

I have a big problem with url rewriting for IIS 7.0.

I wrote a simple rewrite module for my NET3.5 / IIS7 web application. Here is some of the code.

    public void Init(HttpApplication context)
    {
        context.BeginRequest += new EventHandler(context_BeginRequest);
    }

    void context_BeginRequest(object sender, EventArgs e)
    {
        HttpApplication app = sender as HttpApplication;
        if (app.Request.Path.Contains("pagetorewrite.aspx"))
            HttpContext.Current.RewritePath("~/otherpage.aspx");
    }

      

        
        
        
      

    

And I register my module in web.config:

  <system.webServer>
<validation validateIntegratedModeConfiguration="false"/>
<modules>
              <add name="MyModule" type="MyModule" preCondition="" />

      

        
        
        
      

    

In IIS 7.0 (Vista) using Classic ASP Pipeline, it works fine, but when I change the pipeline mode to Integrated it stops working. There are no exceptions, errors and everything in debugger / events / logfiles messages, only this page was not found in the browser. The scariest part is that the pagename looks wrong or is merged from parts of the original page and rewritten to the page.

I deployed my code on another machine (also vista -but x64- and iis 7.0) and it works fine in both modes. Looks like there is a configuration issue or what?