Lnux Administrator who know PLESK very well

I am looking for a Linux administrator who knows PLESK very well. I changed a domain and set SSL certification via PLESK. It didn't work. When I accessed my server by web browser, I saw certification for the previous domain. I check a certification on PLESK, it is surely for a new domain. This is how I set a certification. "Settings" -> "SSL Certificates-" > I set certification. "Settings" -> "IP addresses" -> I chose the certification the I set. Please work for me just now chatting with me.