Without installing Atlas, its not working in IE

I am developing Website Application using VS 2005 and Atlas June CTP. In the application, one page contains user control which has two Dropdown lists. Depending upon the value of first dropdown list, using Atlas, second list will get populated. I have added UpdatePanel control in user control (ascx page) for second list and Script manager in aspx page. I have added reference of Atlas.dll and modified Web.config also. This is working in IE and FireFox.
If I uninstall Atlas and run the application, it's not working in IE. To make it work in FireFox, I need to include "Scriptlibrary" folder into solution. But in IE, "SelectedIndexChanged" event is not getting triggered.
The application is working fine for both the browsers on machine where Atlas is installed. Which other assemblies are required to run Atlas on the machine where Atlas is not installed?

Thanks in advance,
Milind

hello.

well, if you're not using the atlas toolkit, then you only need the atlas dll.

Hello,
I am not using Atlas toolkit. Atlas.dll is already present in the "Reference" but still it's not working. Everything is working fine on developer's machine where Atlas is installed.

Thanks,
Milind

hello again.

the only thing that occurs to me is if the web site is not configred as a web app or is not using asp.net 2.0...