try changing
NavigateUrl='<%#Eval("AcronymId","Acronym.aspx?AcronymId={0}&Email="+Request.QueryString["Email"]&DisplayName="+Request.QueryString["DisplayName"]) %>'
to
NavigateUrl='<%# string.format("Acronym.aspx?AcronymId={0}&Email={1}&DisplayName={2}", Eval("AcronymId"), Request.QueryString["Email"], Request.QueryString["Email"]) %>'
You might need to fix the syntax up a little, it is quite hard to read here!