> 10:57:49 Error:  "Connect Error" (-4) after 2
> retries at link www.mtu.edu/robots.txt (from
> primary/primary)
> 10:57:52 Error:  "Connect Error" (-4) after 2
> retries at link www.mtu.edu/ (from primary/primary)

Do you require a proxy to access the web?  You'll need to set it in the
HTTrack options.