Hi Bruce,
The *.crt and *.key files are in the correct place and the certificate is installed on the PC.
The *.crt file was converted from a *.cer, could it be that the file was not converted correctly or in the right format? Or the *.key file was not made correctly?
Is there anything else I am meant to be doing other than putting these files in the correct place? I tested using SSL on this WebServer in my own testing environment (Server 2003, self made certificates, accessing externally) and it worked perfectly. Just not on the client's environment with their own certificates.
Thanks,
Trent