There shouldn't be anything different with Impersonate true as long as the user you are using has rights to debug. It works fine for me here without any changes but I am running under an Admin account.

+++ Rick ---

>Hi,
>
>FWIW, further to my problem of the browser hanging when impersonate="true" - I worked out the cause:
>
>I had a 'Stop' in the .ASPX code for debugging purposes. Without this everything worked fine but, with a 'Stop' the browser hung.
>
>So now I trying to work out how I can get debugging to work when using 'impersonate="true"'. I tried making the logged-in account a member of the 'Debugger Users' group but that didn't seem to help....
>
>Regards,
>Viv