By default MacOS X machines have different names when connected and when not connected. After changing the connection state, the 64-bit LispWorks license check will fail, because the data is encoded with the machine name.
The machine name is configured by the line
The recommended fix is to edit
to give your machine a fixed hostname, then reset the license file if necessary by running in Terminal.app:
where SERIALNUMBER and LICENSEKEY are the strings supplied with LispWorks. Then the LispWorks license check will always lookup the expected hostname.
Note: this section does not apply to 32-bit LispWorks for Macintosh.