Problems installing Netscape 6.1

Dear list, I have just decided to install Netscape 6.1 as my current version of netscape that came shipped with suse 7.1 professional crashes everytime I try to use it. I downloaded the software and unzipped the file as per installation instructions. As superuser I then tried to execute the installation script ./netscape-installer The result of this command is shown below:- Xlib:connection to ":0.0" refused by server Xlib:Client is not authorised to connect to server Gtk-WARNING **: cannot open display: :0 Could somebody please tell me the steps that I must complete in order to get around the problem described above. Many thanks in advance Neil Briggs