OpenLDAP w/ SSL cert signed by Network Solutions

Running openldap-2.4.31 on Ubuntu 14.04.1 LTS compiled with gnutls. I created a local key and CSR using certtool: server.csrserver.key I was then issued the following from Network Solutions: AddTrustExternalCARoot.crthostname.domain.com.crtNetworkSolutions_CA.crtUTNAddTrustServer_CA.crt I added the following to slapd.conf: TLSCertificateFile /etc/ldap/certs/hostname.domain.com.crtTLSCertificateKeyFile /etc/ldap/certs/server.keyTLSCACertificateFile /etc/ldap/certs/NetworkSolutions_CA.crt ...and I now get the following error when I try to start slapd: Oct 20 10:49:58 hostname slapd[3476]: main: TLS init def ctx failed: -1

Can someone point me in the right direction as to what I am missing here?