1) Create a self signed certificate in ISPConfig.
2) Take the certificate request which is shown in the ispconfig interface then and let it sign by godaddy.
3) The certificate (crt) that you receive as result of the signung process has to be pasted into the certificate field in ispconfig and then select save certificate as action. Be aware that only a certificate will work ere the ecrtificate request has been generated by ISPConfig.
4) upload the intermediate file to the ssl directory of the website and add the line:
to the apache directives field. In the line you posted above there is a space missing after SSLCertificateChainFile.