http server port 443 not active

(Windows XP, OAS 10.1.2) I have setup my HTTP server for SSL using enterprise manager. Right now its listening to port 80 and 443. It was working when I initially configured it and accepting the certificate chain I established. But after a reboot the server has stopped listening to port 443. I've tried restarting the service and http server but no luck. I also ran netstat -a to see if port 443 was used by another service but it seems to be available.

HTTP Server entires when clicking on 'Ports':
Oracle HTTP Server      Diagnostic      7200       7200-7299      
Oracle HTTP Server      Listen                 80         80;7777-7877      
Oracle HTTP Server      Listen (SSL)                   443;4443-4543      <-- no value for port in use column

Virtual Hosts:
Server Name  Port      IP Address      Type              Protocol         Average Response Time (seconds)
127.0.0.1      7200       127.0.0.1         IP-based      http                   0.003
holsteadj      443                                default        https (SSL)         Unavailable

ssl.conf snippet:
Listen 443
    #
#   Some MIME-types for downloading Certificates and CRLs
#
    AddType application/x-x509-ca-cert .crt
    AddType application/x-pkcs7-crl .crl

    <VirtualHost _default_:443>
        #  General setup for the virtual host
        DocumentRoot "C:\oracle\FRHome_1\Apache\Apache\htdocs"
        ServerName holsteadj
        ServerAdmin holsteadj@saic.com
        ErrorLog "|C:\oracle\FRHome_1\Apache\Apache\bin\rotatelogs logs/error_log 43200"
        TransferLog "|C:\oracle\FRHome_1\Apache\Apache\bin\rotatelogs logs/access_log 43200"
        Port 443
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