Try to install Zimbra onto a new Ubuntu machine

everything was done accordingly so far.
but when the installation reach the zimbra-spell the installation stops.

Here is the information:
root@tigernet://home/maxma/Desktop/zcs# ./install.sh
hostname: No address associated with name
./util/utilfunc.sh: line 42: [: =: unary operator expected
hostname: No address associated with name

Operations logged to /tmp/install.log.17503
Checking for existing installation...
zimbra-ldap...NOT FOUND
zimbra-logger...NOT FOUND
zimbra-mta...NOT FOUND
zimbra-snmp...NOT FOUND
zimbra-store...NOT FOUND
zimbra-apache...NOT FOUND
zimbra-spell...NOT FOUND
zimbra-core...NOT FOUND


PLEASE READ THIS AGREEMENT CAREFULLY BEFORE USING THE SOFTWARE.
ZIMBRA, INC. ("ZIMBRA") WILL ONLY LICENSE THIS SOFTWARE TO YOU IF YOU
FIRST ACCEPT THE TERMS OF THIS AGREEMENT. BY DOWNLOADING OR INSTALLING
THE SOFTWARE, OR USING THE PRODUCT, YOU ARE CONSENTING TO BE BOUND BY
THIS AGREEMENT. IF YOU DO NOT AGREE TO ALL OF THE TERMS OF THIS
AGREEMENT, THEN DO NOT DOWNLOAD, INSTALL OR USE THE PRODUCT.

License Terms for the Zimbra Collaboration Suite:
http://www.zimbra.com/license/collab...cense_1.0.html


Press Return to continue

Checking for prerequisites...
NPTL...FOUND
sudo...FOUND sudo-1.6.8p12-4ubuntu5
libidn11...FOUND libidn11-0.6.3-1
curl...FOUND curl-7.15.4-1ubuntu2
fetchmail...FOUND fetchmail-6.3.4-1ubuntu4.1
libpcre3...FOUND libpcre3-6.4-2ubuntu1
libgmp3c2...FOUND libgmp3c2-2:4.2.1+dfsg-3
libexpat1...FOUND libexpat1-1.95.8-3.2
libxml2...FOUND libxml2-2.6.26.dfsg-2ubuntu4
libstdc++6...FOUND libstdc++6-4.1.1-13ubuntu5
libstdc++5...FOUND libstdc++5-1:3.3.6-13ubuntu2
openssl...FOUND openssl-0.9.8b-2ubuntu2
Checking for required space...

Checking for installable packages

Found zimbra-core
Found zimbra-ldap
Found zimbra-logger
Found zimbra-mta
Found zimbra-snmp
Found zimbra-store
Found zimbra-apache
Found zimbra-spell


Select the packages to install

Install zimbra-ldap [Y]

Install zimbra-logger [Y]

Install zimbra-mta [Y]

Install zimbra-snmp [Y]

Install zimbra-store [Y]

Install zimbra-spell [Y]

Installing:
zimbra-core
zimbra-ldap
zimbra-logger
zimbra-mta
zimbra-snmp
zimbra-store
zimbra-apache
zimbra-spell

The system will be modified. Continue? [N] Y

Removing /opt/zimbra
Installing packages

zimbra-core......zimbra-core_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-ldap......zimbra-ldap_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-logger......zimbra-logger_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-mta......zimbra-mta_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-snmp......zimbra-snmp_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-store......zimbra-store_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-apache......zimbra-apache_4.5.4_GA_763.UBUNTU6_i386.deb...done
zimbra-spell......zimbra-spell_4.5.4_GA_763.UBUNTU6_i386.deb...FAILED
###ERROR###

zimbra-spell_4.5.4_GA_763.UBUNTU6_i386.deb installation failed

Installation cancelled

Can anyone give me some instruction?

many thanks