I am trying to start jenkins using a CA signed certificate but I am getting this error

Running from: /usr/lib/jenkins/jenkins.war
Apr 01, 2014 9:56:01 AM winstone.Logger logInternal
INFO: Winstone shutdown successfully
Apr 01, 2014 9:56:01 AM winstone.Logger logInternal
SEVERE: Container startup failed
java.io.IOException: Failed to start a listener: winstone.HttpsConnectorFactory
at winstone.Launcher.spawnListener(Launcher.java:209)
at winstone.Launcher.<init>(Launcher.java:149)
at winstone.Launcher.main(Launcher.java:354)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at Main._main(Main.java:293)
at Main.main(Main.java:98)
Caused by: java.io.IOException: DerValue.getBigInteger, not an int 48
at sun.security.util.DerValue.getBigInteger(DerValue.java:511)
at winstone.HttpsConnectorFactory.readPEMRSAPrivateKey(HttpsConnectorFactory.java:171)
at winstone.HttpsConnectorFactory.start(HttpsConnectorFactory.java:90)
at winstone.Launcher.spawnListener(Launcher.java:207)
... 8 more

Open ssl was used to generate the key and csr, then the CA gave us back the cert. What could be causing this error?

JENKINS_ARGS="--httpsCertificate=/var/lib/jenkins/cert/cci-jenkins_uncc_edu_cert.cer --httpsPrivateKey=/var/lib/jenkins/cert/cci-jenkins.key"