Parallel profile validation failed for some unknown reason

I have 2012b installed on a server under Debian Wheezy. I want to work with it remotely through PCT. All connectivity tests in Admin Center passed successfully, but validation of a cluster profile (on client machine) did not. Job test and Pool job test failed, SPMD passed. Maybe you could recommend a solution to this problem. Here are some of validation results:

Stage: Job test (createJob)
Status: Failed
Description:The job errored or did not reach state finished.
Command Line Output:(none)
Error Report:
Cannot rerun task because there are no rerun attempts left (task has no rerun attempts left).
Original cancel message:
Error submitting fevalRequest: Java exception occurred: 
java.lang.NoClassDefFoundError: com/mathworks/webservices/client/core/MathWorksWebServiceClient
  at com.mathworks.services.lmgr.HBManagerImpl.getInstance(HBManagerImpl.java:48)
Caused by: java.lang.ClassNotFoundException: com.mathworks.webservices.client.core.MathWorksWebServiceClient
  at java.net.URLClassLoader$1.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  ... 1 more
.iSetupHeartbeatListener(/opt/matlab/toolbox/distcomp/distcomp_evaluate_task.m:496)
.distcomp_evaluate_task(/opt/matlab/toolbox/distcomp/distcomp_evaluate_task.m:28)
Debug Log:(none)

Stage: Pool job test (createCommunicatingJob)
Status: Failed
Description:The job errored or did not reach state finished.
Command Line Output:(none)
Error Report:
Cannot rerun task because there are no rerun attempts left (task has no rerun attempts left).
Original cancel message:
Error submitting fevalRequest: Java exception occurred: 
java.lang.NoClassDefFoundError: com/mathworks/webservices/client/core/MathWorksWebServiceClient
  at com.mathworks.services.lmgr.HBManagerImpl.getInstance(HBManagerImpl.java:48)
Caused by: java.lang.ClassNotFoundException: com.mathworks.webservices.client.core.MathWorksWebServiceClient
  at java.net.URLClassLoader$1.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  ... 1 more
.iSetupHeartbeatListener(/opt/matlab/toolbox/distcomp/distcomp_evaluate_task.m:496)
.distcomp_evaluate_task(/opt/matlab/toolbox/distcomp/distcomp_evaluate_task.m:28)

The parallel job was cancelled because the task with ID 1
terminated abnormally for the following reason:
Cannot rerun task because there are no rerun attempts left (task has no rerun attempts left).
Original cancel message:
Error submitting fevalRequest: Java exception occurred: 
java.lang.NoClassDefFoundError: com/mathworks/webservices/client/core/MathWorksWebServiceClient
  at com.mathworks.services.lmgr.HBManagerImpl.getInstance(HBManagerImpl.java:48)
Caused by: java.lang.ClassNotFoundException: com.mathworks.webservices.client.core.MathWorksWebServiceClient
  at java.net.URLClassLoader$1.run(Unknown Source)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.net.URLClassLoader.findClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClass(Unknown Source)
  at java.lang.ClassLoader.loadClassInternal(Unknown Source)
  ... 1 more
.iSetupHeartbeatListener(/opt/matlab/toolbox/distcomp/distcomp_evaluate_task.m:496)
.distcomp_evaluate_task(/opt/matlab/toolbox/distcomp/distcomp_evaluate_task.m:28)
Debug Log:(none)

Thanks!

[John D'Errico]

Please, posting the identical question 6 times will not get more attention, it will not get a better answer. It will merely see 5 of those questions deleted as essentially spam.

[Alexey]

John, it was the server fault, so I tried to use F5 to make my question posted, maybe it led to extra posts. Sorry