The problem discussed in this thraed is that a jailed user can not login, according to your other thread, your problem is that the shell user is not jailed. So I guess your problem is not related to this thread here.
You can check that in /etc/passwd, if the shell of the jailed user is /bin/false, then your problem might be related to this. If the shell is not /bin/false, then you have a different problem.
Please do not post to other threads if you opened already a thread for your problem.