VMware Tools 'out of date' issue

1. I have created a SUSE10SP1 VM on VMware server 2.0-122956.

2. Installed the VMware tools on it

3. Then converted the VA in OVF format using ovf 1.0-166674

4. Then imported it on my ESX server 3.5-158874

5. Booted the system in ESX 3.5 and checked the summary tab of VI client

Here I am getting status of the VMware tools as "out of date".

For workaround, we added the line 'tools.upgrade.policy =upgradeAtPowerCycle' in vmx file and then done the same steps 3, 4 & 5 as above.

But again we are getting same status as "out of date".

Please suggest, is it possible to autoupgrade the tools?