Installing /PSA_7.5.2/rpm_SuSE_9.1/base/psa-7.5.2-suse9.1.build75050128.10.i586.rpm
===> Reading /etc/tomcat4/tomcat4.conf ...

Trying to define super-server internet daemon type... xinetd
Trying to check if xinetd daemon is running... done
hostname: Unknown host


Unable to resolve hostname or establish network access to
local host: . You should fix this problem prior to installing
Plesk. After you are done, run the installation again.

error: %pre(psa-7.5.2-suse9.1.build75050128.10) scriptlet failed, exit status 1
error: install: %pre scriptlet failed (2), skipping psa-7.5.2-suse9.1.build75050128.10
Not all required packages were installed.
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The pc is on the internet.

Anybody knows what the problem might be?