Help me SSL !

I have a website run with ssl ev buy from comodo on our server. In  this server, we have a lot of another websites. And after install ssl in to this website, others run with https:// then open this website which is installed ssl.
Example : there are 3 webs such as : A.com, B.com, C.com run on a server with ip is 112.112.112.121. I install ssl for website A successful; but after installation when I type https://B.com instead of open website B, it open website A

try this http://forum.centos-webpanel.com/ssl/how-to-install-multiple-ssl-certificates-on-shared-ip/