yum is hanging up

[netmask]

> yum install just hangs here for the last few days.
>
> [root at localhost root]# yum update
> Gathering header information file(s) from server(s)
> Server: Fedora Core 2 - i386 - Base
>
>
> Has anyone experienced this?
> I have not changed my yun.con file.

I used yum yesterday without issue..  have you verified no firewall changes 
have occured, and that you can route to the yum update server?