problem with insttal ZCA linces error

[ebtihal1122]

dear :

iam download zimbra network trial but when instal it in single mode every thing in the bigining work fine .but inthe end of installation :

Run /opt/zimbra/libexec/zmsetup.pl to configure the system

INSTALL FINISHED

DOWNLOADING LICENSE FROM license.zimbra.com...

curl: (6) Couldn't resolve host 'license.zimbra.com'

DOWNLOADING LICENSE FAILED

INSTALL FAILED

UPDATING ZIMBRA PROXY...

Not updated the Zimbra specific proxy server.
ERROR OCCURED, INSTALLATION COULD NOT PROCEED !!
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[ebtihal1122]

sorry i shouldnot replay but its argent case