Netscape 4.08 questions

[Tommy]

I while ago I installed netscape communicator 4.08 in /usr/local. I
works fine except that it is extremely slow.  Specificly, If I am at the
browser page and try to open the mail window it takes about 2 minutes. 
That is not the time to get the mail, but simply to open the window. 
Does anyone know what the problem could be?  Thanks