API questions about Symantec Encryption Management Server (SEMS) ?

Can you point me to any documentation about using the programming API for  SEMS? (preferabbly in  C#/.net)

Also, can you tell me why I get this error when I try to add a public key to SEMS ?

'The server is unwilling to process the request'

I am using Didisoft to connect to the SEMS , like this :
            DidiSoft.Pgp.Net.LdapClient ldap = new DidiSoft.Pgp.Net.LdapClient(pgpServer);
            ldap.SubmitKey(File.ReadAllBytes(@"c:\junk3\peterpublicGmail.asc"));

Thanks,Peter