XKEYBOARD extension in Xmanager available? [1]

On starting a virtual machine inside vmware (www.vmware.com)
it brings up a message box:

"Your X server does not support the XKEYBOARD extension."

Is there a way to switch this feature on in Xmanager?
The documentation seems not to address that issue.

Unfortunately XKEYBOARD extension is not available currently.
It will be included in future version.

If you do not use an X application that requires the extension, you can just ignore the messages.

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Technical Support