If you are using IE, you may need to add your WiKID server into the list of trusted sites. Go to Tools --> Internet options --> Security --> Trust sites and add your WiKID server.

If you can telnet to port 443 on your WiKID server (ping is blocked by the WiKID server firewall) and if you run 'netstat -anp | grep 443' on the WiKID server to see that the listener is up and the URL shows but there is no error or any content at all on the web page, then your browser probably doesn't like the WiKIDAdmin certificate.