[newbie] Netscape freeze

[Juggernaut]

Hello....
I'm using Mandrake 7.0 And then, if I want to access Netscape Communicator
(not Netscape Navigator, because my GNOME has 3 icon for Netscape), it will
freeze up. There is an information about 'reading file' at the left corner.
And Netscape does not show anything (blank). But if I open Netscape
navigator, it work fine. Anyone can help me ?
BTW, are there any deferentitation between Netscape  Navigator and Netscape
Communicator ?
Thank you very much.

-Pungki