OWA Access slow   

When I use OWA to access my companies exchange server from within the 
firewall, it works ok. Whenever I access outside the firewall it is slow to 
the point of
unusable. I can use Firefox 1.5 and it behaves normally.  What can I do
to IE to correct this?

Thanks

date: Sat, 21 Jan 2006 16:53:53 -0700   author:   Eric