I have found the problem. Its working for me, when I remove the compression, i have to remove: "comp-lzo yes"
Manuel wrote
--proto p
Use protocol p for communicating with remote host. p can be udp, tcp-client, or tcp-server.
Please allow me this comment. This is very confusing, cause udp is a network transport protocol, this is Ok, but tcp-client and tcp-server not, this are network roles, not protocols. And you are define the role of the configuration in the server/client configuration with "mode server" or "client", its, as i said before: confusing...
But thanks a lot for your help/input.
PS This configuration above - with comp-lzo yes - was working with iOS before 7.1.1.