weird link showing up for my site in Web results

how can i change this?

[maxxtraxx]

recently i noticed on the Yahoo Web results listing for my site the url it is displaying is showing a source tracker from one of my affliate sites.

e.g. - www.mysite.com/?source=WIU

how can i change this back to:

www.mysite.com

any help would be much appreciated, this is very frustrating.

thanks

[rogerd]

Maxxtraxx, are you sure that this isn't in the Overture part of the SERPs?

If this is in the natural results, has your affiliate linked from their site to yours with it? Perhaps their page has such high PR that the URL with the tracking code is outperforming your plain URL?

Nice bit of luck or planning for the affiliate site, as they'll get credit for the Google searches that turn up your site.