[FreeNX-kNX] Windows NX client fails with Error 112 port bind for font error

[Frank Church]

Whenever I have one NX client and I try to make a new connection I get
the error below

Error: Call to bind failed for font TCP port 11000. Error is 112
'Address already in use'.

When I try another connection to machine on the local network, I don't
get such errors

What could be the problem, I am using the Windows NX client with
freenx on fedora