multiple logins while displaying user profile images on a page in sp 2010

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SharePoint

hi all,
i am facing a problem to display user profile images in my custom page.i have desined a webpart which displays user profile images.but whenever i open that page its asking for authentication.

problem is all user profile images are stored in sharepoint default port web application.so its asking for authentication to display that image.

even i used spsecurity.elevated previlages in my code it still asking authentication.
can any one solve this problem.