My computer list is empty

I used pocketcloud free for Android for a lot of time and i think that it's the best software for remote control through rdp.
But now it stopped working: it starts normally but it doesn't show my preset in mycomputer list.
I tried to clear the connection and to configure again from the beginning but nothing happens: the computer list remains empty.
I disinstalled and re-installed pocketcloud without success.
Can you help me?
My smartphone is a Samsung note with android 4.4.2
Thanks in advance and excuse for my imperfect english