site map problem..

Question

hi.. i have create sitemap file for my website..

but problem is some pages in my site are depend of previous page becoz of query string..

suppose if we open the photos.aspx then it depend on the albumid which is provided by previous page album.aspx.. and that album page is again depend on profile page..

In this case after reaching to the photos page when user clicks on album.aspx is shows the error

Object reference not set to an instance of an object.

becoz querystring is passed from profile.aspx but not from photos.aspx  is not provided becoz its provided by profile.aspx..

what is the solution in this ?

now after this when

how to solve this ??