postgresql 9.4 streaming replication

I have the following problem: i am trying to set up a streaming  
replication scenario with load balancing. I read various tutorials but  
i cannot find the mistake. The replication does not work. I do not  
have a "wal sender/receiver process". The archiving works and  
everytime the master restarts, the archived wal files are copied to  
the slave. I even do not get any error. And in configuration file(s)  
everything looks like fine for me, e.g. master:

wal_level = hot_standby
wal_keep_segments = 32
max_wal_senders = 5
max_replication_slots = 5
wal_sender_timeout = 60s

What irritates me the most is that there is no "wal sender process"  
and there is no error thrown.

Thank you for any idea,
Sven