Note: this is a very general fix, and I have no idea if it affects other webpages or changes security settings.
For anyone that IS having trouble making the client working...
Internet Explorer:
click top menu bar: Tools > Internet Options
click tab: Security
click check mark: Trusted Sites
click button: Sites
This site should be displayed, if not...
add website: http://gc.gamestotal.com/
uncheck: Requires Server Verification...
click button: OK
S
StazioOP