still getting duplicate image problem with slideshow extender??

hi,
I have  a SQL database table called Images.
ImageId - int
ArtistId - GUID
ImagePath - nvarchar
FirstName -nvarchar
LastName - nvarchar

On the aspx page is the Ajax Slideshow extender code.
There is a query string "Musician" and when the page loads it looks something like this

http://www.xxxxxxxxxx.com/xxxxxxxxxxxxx.aspx?Musician=0587f133-a07a-4b3f-9a1a-9ce50a920e7a

The problem is the slideshow should just show images that relate to that artist ( GUID
but sometimes it shows images belonging to other artists -especially in firefox and when
2 browser windows are open.
The imagepath in the SQL database links to the photos on the server.
I have images in different folders NOT that this should be a problem?

here ...