The forum is installed as a sub domain in my website. When the page loads on IE8 it generates a client side error.

I also discovered that the Side Nav Menu for administrative tasks is not visible. What could be the cause since this forum is a support forum for our clients and it needs to go live. The error details is given below

error Webpage error details

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB0.0; .NET CLR 1.1.4322; InfoPath.2; FDM; .NET CLR 2.0.50727; InfoPath.1; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Timestamp: Mon, 8 Mar 2010 09:12:16 UTC

Message: ASP.NET Ajax client-side framework failed to load.

Line: 97

Char: 34

Code: 0

http://forum.visualhr.com/default.aspx?g=admin_admin 

Message: 'Sys' is undefined

Line: 110

Char: 1

Code: 0

http://forum.visualhr.com/default.aspx?g=admin_admin 

Message: 'Sys' is undefined

Line: 316

Char: 1

Code: 0

http://forum.visualhr.com/default.aspx?g=admin_admin