QTcpsocket Problem - unable to read written data to socket

[bmoqimi]

hello there ,

I am writing an accounting open source project for my course.it is finished but by no means I can transfer data between client and server.the qdebug days the data is written to the socket but on the other side I can not read that.I put all the codes in files in the attachments.
the code is small but is very important to me.
even if you do not have time you can look the code and suggest a better way of writing the client/multi threaded server.
most of the code is copied from fortune server/client.
you can make it using qmake

Thank you in advance