you need to check apache error_log ...
latest errors is this
AH02561: Failed to configure certificate host.***.net:443:0, check /etc/pki/tls/certs/host.***.net.cert
[ssl:emerg] [pid 2490:tid 140349867616000] SSL Library Error: error:0906D06C:PEM routines:PEM_read_bio:no start line (Expecting: CERTIFICATE) -- Bad file contents or format - or even just a forgotten SSLCertificateKeyFile?
[ssl:emerg] [pid 2490:tid 140349867616000] SSL Library Error: error:140AD009:SSL routines:SSL_CTX_use_certificate_file:PEM lib
any suggestion? pls