SAP GUI Addon does not forward credentials

Hi all,

since our upgrade to Remote Desktop Manager 12.0.8.0 the SAP GUI Addon is not forwarding user credentials which are not in the private vault.
On the screenshots SAP_Credentials_Fail1.png you can see the credentials that do not work, on SAP_Credentials_Fail2.png you can see the message that follows the failed login attempt (you can see it shows hzingl which is the current rdm user, it should use admin.hzi instead). On SAP_Credentials_OK.png you can see the private-vault credentials that work, both credentials have the same content, the only difference is that the not working credentials are not stored in the private vault.

I already upgraded the SAP GUI Addon to the newest version (DLL date from 11th May 2017) with no success, do you have any idea how to fix this?

Best regards,
Hermann