Be sure that keystore and alias have same password.
ok these are the following procedure that i did to convert the Certificate.pem and Key.pem ----to---> server.keystore
***just to be sure that i did it with the right way !!***
1.Convert PEM to PFX
openssl pkcs12 -inkey key.pem -in cert.pem -export -out newKey.pfx
2.Convert PFX to JKS
3. after that i configure the server.xml with the following :
Your certificate is issued by a CA (CN=al-sard_ca, OU=IT, O=COMPANY, L=S, ST=S, C=IQ).
The keystore must trust that CA.
So you have to export CA certificate (in DER format) and trust it in "server.keystore" with keytool or other tool (ex. keytool-UI).
Restart Jboss a make a browser connection on port 8443. It should be OK.