Mark,
to find the error why there is no Managment Server availabel ot CGSADM try to follow these instructions:
stop the EHS Administration Managemtn Server in Windows Services.
Start the ehsmansrv.exe from console.
Check if it connects OK, or if any error messages occur.
If there are errors, fix configuration in SAPRFC.INI
If OK, do further checks:
compare settings of GWHOST, GWSERV and PROGID in SM59 and SAPRFC.INI for the destination, they need to be identical.
If this still does not help, check note 839750 for further tricks.
If you still got issues, open a SAP support ticket.
Regards,
Christian