I can install the software ok, and all works fine untill I restart the server (computer) that is when I get this error. Any idea what the cause can be? When I uninstall 3CX, and reinstall it works fine, but do a restart it throws this error again. Event Type: Error Event Source: PostgreSQL Event Category: None Event ID: 0 Date: 2/02/2009 Time: 8:41:55 PM User: N/A Computer: xxxxxx Description: The description for Event ID ( 0 ) in Source ( PostgreSQL ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: FATAL: could not reattach to shared memory (key=5480001, addr=01380000): Invalid argument .