Outlook 2003 Problems connecting to exchange server over internet using Windows Server 2003 as Client

I have a clean (almost) install of Windows Server 2003 that I use as my desktop computer as well as a server for other things.  I need to connect to an Exchange server over the internet (thinking it's V 5.5 SP4, its IP is 137.159.8.56) and Outlook 2003 always either times out or says my server is not available.  I have a similar setup using Office XP and it seems to connect although it is extremely slow, this machine is outside the local network as well.  Is there a way to do this without using RPC over HTTP as I can't seem to get that to work either.  We have a webmail feature at webmail.pepperdine.edu although I am not sure if this is the same system used for RPC over HTTP.  This is a college mail server and I was able to access it fine from on campus, now that I moved off I have all the trouble in the world.  Thinking I'll need lots of ideas on this one.  Thanks...
mhab12Asked:
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rockiroadsConnect With a Mentor Commented:
regarding timeouts, would this help

http://support.microsoft.com/?kbid=831060

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