SSRS 2005 with ASP.NET Report Viewer

Hi unfortunately we only have SQL Server 2005 so I am stuck with SSRS 2005. I have created a report and runs as expected. I have an issue though. When I combine it with the Microsoft Report Viewer it's width is shrunk. I have noticed this comes back to normal if I force my app to use IE7 however then i'm on a whole totally different issue with the site not looking quite right and some of the Ajax functionality does not work slickly as I would like it. is there anything I can do, looking at the HTML it looks as if the SSRS report is adding a table and a column after my report. Can anyone help remove this, as it does not look professional.

Thanks