ASP.NET and GridView: Web application does not respond on GridView1_SelectedIndexChan

[Varg]

I have a Web application that start behaving strange this year.
It works on the most OS but not if I use PC with Windows 7 Home Premium SP1, IE 10 , 64bits.
It do not give any Error it give no respons on clicking on a selection button in a ASP.Net Gridview, no error just no response. Other OS it works fine.
One of my users said that it worked fine last year. Could it be IE10? I thing it has been an upgrading from IE9 to IE10 this year.

I have a small sample that show the problem.
If you try: www.norwayhouse.no and try to select(click) on the select button it shall write the name on the right side if it works ok.

Any help for the above problem is much appreciated !
Please !
Varg

Here is the VB.net instructions

Sub GridView1_SelectedIndexChanged(sender As Object, e As System.EventArgs) Handles GridView1.SelectedIndexChanged
 
       Dim Row As GridViewRow = GridView1.SelectedRow
       Me.lblGruppe.Text = Row.Cells(2).Text
 
End Sub