Cerficiate Error with FTPs connection

I am experiencing the aproblem with anFTPS connection. We already have two vendors using FTPS successfully. I have loaded the certificate into NWA Java Keystore (We are 7.11 EHP1 SP6). When attempting to send a document to the FTP server I get the following message.

Error when getting an FTP connection from connection pool: com.sap.aii.af.lib.util.concurrent.ResourcePoolException: Unable to create new pooled resource: iaik.security.ssl.SSLException: Error decoding Certificate: java.security.cert.CertificateException: Certificate format error: java.lang.ClassCastException: class java.lang.Integer:null incompatible with class [B:null

FYI - We are able to communicate using FTP and I am able to connect to the client from home via FTPS. So I can confirm the FTP server is operational, it will work via FTPS and IP addresses aren't being blocked.

Any suggestions would be appreciated.