a very weird problem (AGAIN!!!)

[Michael]

Hi guys,
First of all I want to apologize for posting this thread again, but I do really need help with this.
I couldn't solve the problem yet and I don't understand why this could be happening, so PLEASE if anyone of you have an idea about why is this happening I would apreciate your help very much.
The authentication I'm using in my website is WINDOWS.
The error I'm getting is :

Hi everybody,
I'm having this problem again but in another application.
The application was build with ASP.NET and VB.NET, the problem is, when I press the LogOut button, I'm getting an error in the Bottom left corner of Interner Explorer and the error is :

Line: 80
Char: 13
Error: Invalid Pointer
Code: 0
URL: "the url of my website"

The code under the LogOut button is:

Response.Write("<script>window.close();</script>");

The most weird problem is that this error occurs on some IE but on others it work correctly !!!
I've checked the version of my colleague's IE, and the version and the service packs that are installed and are the same !
The version is: 6.0.2900.2180.xpsp_sp2_grd.050301-1519CO
Cipher Strenght: 128-bit
Product ID: xxxxxxxx
Update Versions:; SP2;

I really don't understand what's going on !
Is it possible it's a problem on the IIS coniguration ?

Thank you all !