I've observed this:
#Unable to connect to demo accounts from Android clients, e.g. both Forex Trader (EU) and SWFX Trader
#Unable to connect to demo accounts via API
2014-06-09 10:48:06.765 WARN WhiteLabelData - White Label Image is not received
2014-06-09 10:48:16.646 INFO ClientConnector - Authorization timeout
2014-06-09 10:48:16.766 ERROR Main - Failed to connect Dukascopy servers
#HOWEVER, DDS2.greed.connection finds some available server after longer time and connects successfully