Forum error message after changing forum host/domain
 

i have recently taken over as admin on a forum.
we have swtiched servers and changed domain names.
PMs have been running fine for 4 days but now whenever a user tries to send a PM they get this authentication request..

the URL and Company name refer to the old host and old domain name..is this some kind of password grabber??!!
Attached Images

• http://vb.ma7room.com/jpg.gif keycode.jpg‎ (80.2 KB)