SEL_E_SECPKG_NOT_FOUND error from AcquireCredentialsHandle ()

I am getting the above error when trying to run code from the Microsoft Secure SOAP sample http://msdn.microsoft.com/en-us/library/s2ya483s.aspx

The call from M'soft code seems to be correct:

Status = g_Sample_SecurityInit._SecurityFunc.AcquireCredentialsHandleA(
    NULL,                   // Name of principal    
    UNISP_NAME_A,           // Name of package
    SECPKG_CRED_OUTBOUND,   // Flags indicating use
    NULL,                   // Pointer to logon ID
    &m_SchannelCred,        // Package specific data
    NULL,                   // Pointer to GetKey() func
    NULL,                   // Value to pass to GetKey()
    &m_hClientCreds,        // (out) Cred Handle
    &tsExpiry);             // (out) Lifetime (optional)

      

        
        
        
      

    

Any ideas on how to proceed? FWIW, this is part of the SSL client, but I don't need client side authentication.

Roni