Problems of setting up MDCS cluster

Hi, i am trying to setup a MDCS cluster, but having some problem.

All my machines are running windows 7. My Matlab MDCS cluster is running in one sub network. My client machine is running in another sub network. The cluster seem working fine. When I use test connectivity in the GUI Admin Center, everything is normal. However my client can not connect to the server. When I validate the profile. It gives the following error.

 Could not contact an MJS lookup service on host 'hostname'. Possible reasons for this problem are:
....
The hostname, xxx, corresponds to the fully qualified hostname xx.xx.xx.xx.
This computer resolves it to the IP address xx.xx.xx.xx.

The IP address is resolved correctly. On the client machine, When I use nodestatus -remotehost hostname to diagnose the problem. it shows

 Job manager lookup process:
     Status                        Running
Job manager:
     Name                          Jobman
     Running on host               hostname
     Number of workers             24
Summary:
The mdce service on hostname manages the following processes:
     Job manager lookup processes  1
     Job managers                  1
     Workers                       0

It is strange the number of workers reported in the Job manger part and the summary part are different (24 vs 0), which 24 is the correct value.

On my client machine, I can use the local MDCE service without any problem.

Could you please help me out and tell me what is the problem with my setup?