Hi,
maybe I understand what the problem is - TSM server comes with the command line interface in the "console" directory - it is named wzrdhlpr.exe and it is nothing but renamed dsmadmc.exe (even file properties say that "dsmadmc" is the original name)
And its version is 5.4.0 even for TSM server v622.
It is part of the server install - you do not need to install the client. Yes, you can - but there is no point just for having higher version of the admin command line interface.
Harry