TPM connection problem

I am running a 32 bit Vista Business OS on a T60 Lenovo laptop. At startup I
get the message as follows:

There was a problem connecting to the TPM (security device) on this
computer. It is possible that anti-virus or firewall software is blocking
the connection. A missing or disabled device driver could also cause this
problem. See the online documentation for more information.

Everything seems to be in order. The chip (Atmel TPM vesion 3.0.0.15) is
enabled and neither the firewall nor antivirus appear to be blocking.

Any help on how to handle this will be greatly appreciated. Thanks. Don

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Don