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Alex great, didnt know that, thnx for your help, now it works.
Awesome app.
I could find anything about failed connection.
My server is of synology and i want ot connect through SSH to change the files. 
I can connect with iPad file vSsh with no problem only with username and password.
What can i do else?
Yes it does. On my iPad i have another ssh client and with this i can connect without troubles.
I will check that.