Problem installing Migration Tool

Hello,

When I attempt to install the Migration Tool on my server I get the following:

[root@mail zextras_migration_tool-1.6.2]# ./install.sh all

FOUND Zimbra ..

./libs/functions.sh: line 82: [: too many arguments
The current Zimbra installation version doesn't meet the minimum requirements to install ZeXtras successfully.
Read the minimum requirements for ZeXtras and, if you wish, upgrade Zimbra accordingly.

Checking my version, I get:

[zimbra@mail ~]$ zmcontrol -v

Release CentOS5_64 FOSS edition.

When I check the version through the GUI (Help Desk > About Zimbra Version) I get: Version 6.0.14_GA_2928.FOSS Aug 2, 2011

How can I get the CLI to reflect the correct information, so that the tool will install.

Thank you much,
Doug