SAPGUI problems

I am trying to run NW4 trial on SUSE 10.1 however I am unable to run the gui. Can someone offer some insight, I am getting the following response after each attempt:

# gui
JAVA=/usr/lib/java/bin/java: Command not found.
PH=/opt/SAPGUI/6.30rev4/jar: Command not found.
SOI=/opt/staroffice7/program/classes: Command not found.
JAVA: Undefined variable.

Thanks for your help.