Javascript ShowModalDialog function problem

I m using ShowModalDialog function of javascript to display a popup window, like this

window.showModalDialog("CardActivation.aspx",window ,"dialogWidth:800px; dialogHeight:400px; resizable:yes");


and on CardActivation.aspx page,  Page_load() event i m poulation a text box with a value i receive from a session variable.

My problem is that, The Page_Load() fires the first time the session starts, but after that it doesnt get fired.
Can anyone help me with what is the problem.. thanks a lot in advance
jyotishbAsked:
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stanscott2Commented:
I think the problem is that CardActivation.aspx is being cached.  You can use various methods to set no caching in the <HEAD> section of this page (Google "prevent page cache"); you can also use a dummy string you create based on something like the date and time, and use this:  CardActivation.aspx?var=mydummyresult, instead of CardActivation.aspx.  Where you add something in the QueryString this way, the browser will be forced to reload.
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