SSL Cert - SCEP Enabled

I have a couple of costumers that use Comodo SSL Cert for their Tomcat WebServer, and we are having some difficulties with the SCEP part of it.
My question is, when we send a CSR to Comodo and ask for a SSL Cert, do we need to ask for a SCEP enabled Cert, or they are all SCEP enabled from root?

Sorry if it sounds like a dumb question. But there are users that have Comodo certs working, and others have trust issues and troubles with SCEP part of it.