In My experience the VMWare Tools install script breaks the network about 50% of the time.
After faffing about with it and half a dozen reboots I finally got it going a few months ago, but teh recent upgrade to 7.1 broke VMWare Tools as Podge mentioned.
Anyway,
I have a workaround that doesn't require the install of VMWare-Tools, and (should) survive future Kernel upgrades.
Switch OFF Network Time in the server-manager panel.
Now create a custom template fragment
mkdir -p /etc/e-smith/templates-custom/etc/crontab
touch /etc/e-smith/templates-custom/etc/crontab/66_ntpdate
Open the above new file in your favourite editor (vi / pico) and add the following (Make sure you put in a line feed below the last line)
Replace 10.10.10.10 with a local NTP server if you have one, or with your local pool.ntp.org (e.g. uk.pool.ntp.org)
#Update Clock every 2 minutes
*/2 * * * * root ntpdate 10.10.10.10 > null
The /2 is the number of minutes between each update, if your clock is not running incredibly slow or fast, you could reduce this to every 10 minutes or every 30 minutes.
The > null is to stop you getting an email every X minutes telling you it has run.
You might also consider running an NTP server on the VMWare Host, and syncing up off that.
once you have made your adjustments:
expand-template /etc/crontab
/etc/rc.d/init.d/crond restart
Hope this Helps,
Hopefully this annoying issue will be fixed by RedHat / VMWare soon and it will filter down to SME.