IIS/IE problem.. i think..

scenario:
using Internet Explorer

http://192.168.0.114/webproject (considering 192.168.0.114 is my LAN IP)
having this url inputted, gives me error on page

Invalid Character
ScriptResource.axd

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

'Sys' is undefined

But using http://localhost/webproject works just fine.

and whats weird is its also working fine in Firefox even if I enter http://192.168.0.114/webproject in the address bar. (no error at all)

What can be the cause of these errors? Thanks in advance!