Are you able to start the client directly? Please try running swcclient.exe in the program folder.
the client opens (showing 0 players active the whole time) and promts 'client must be restarted...' which closes it.
+1
A few days ago, I had two programs with the beginning "swcpoker..." in Control Panel - Programs. Now, I've only one,
swcpoker.exe, the other one (swc-msi) doesn't appear.
edit: after several tries, I've got login and now i'm playing.