can't execute parallel computing?

hello everybody,

I have a problem with parallel computing. I can't open matlabpool. When I type matlabpool 2, I got the following.

Warning: Function C:\Program Files\MATLAB\R2012a\bin\load.m has the same name as a
MATLAB builtin. We suggest you rename the function to avoid a potential name conflict. 
> In distcomp.filestorage.pSetStorageLocation>iRevertCWDandWarningState at 130
  In distcomp.filestorage.pSetStorageLocation>@()iRevertCWDandWarningState(cdir,warnState) at 52
  In onCleanup>onCleanup.delete at 61
  In distcomp.filestorage.pSetStorageLocation at 103
  In distcomp.abstractstorage.abstractstorage at 12
  In distcomp.filestorage.filestorage at 50
  In CJSCluster>CJSCluster.CJSCluster at 332
  In Local.Local>Local.Local at 257
  In parcluster at 51
  In ProfileConfigHelper>ProfileConfigHelper.buildScheduler at 76
  In MatlabpoolHelper>MatlabpoolHelper.parseMatlabpoolInputs at 220
  In MatlabpoolHelper>MatlabpoolHelper.parseInputsAndCheckOutputsForFunction at 100
  In matlabpool at 130 
Warning: Unable to read the required metadata file
 C:\Users\Mahmoud\AppData\Roaming\MathWorks\MATLAB\local_cluster_jobs\R2012a\matlab_metadata.mat 
> In distcomp.filestorage.pSetStorageLocation at 117
  In distcomp.abstractstorage.abstractstorage at 12
  In distcomp.filestorage.filestorage at 50
  In CJSCluster>CJSCluster.CJSCluster at 332
  In Local.Local>Local.Local at 257
  In parcluster at 51
  In ProfileConfigHelper>ProfileConfigHelper.buildScheduler at 76
  In MatlabpoolHelper>MatlabpoolHelper.parseMatlabpoolInputs at 220
  In MatlabpoolHelper>MatlabpoolHelper.parseInputsAndCheckOutputsForFunction at 100
  In matlabpool at 130 
stopped.
Error using matlabpool (line 144)
Failed to open matlabpool. (For information in addition to the causing error, validate
the profile 'local' in the Cluster Profile Manager.)

Caused by:
    Error using distcomp.interactiveclient/start (line 61)
    Failed to locate and destroy old interactive jobs.
    This is caused by:
    The storage metadata file does not exist or is corrupt

 any suggestions. 
Thanks in advance

[Matt J]

Execute the following,

 >>which -all load

and show us the output.

[ahmed hamed]

thanks for you answer here you are the output

C:\Program Files\MATLAB\R2012a\bin\load.m
load is a Java method                                                                    % java.lang.System method
C:\Program Files\MATLAB\R2012a\toolbox\distcomp\cluster\+parallel\@Job\load.m            % parallel.job.CJSIndependentJob method
C:\Program Files\MATLAB\R2012a\toolbox\matlab\winfun\@COM\load.m                         % COM method
C:\Program Files\MATLAB\R2012a\toolbox\idelink\extensions\adivdsp\@vdspdebug\load.m      % vdspdebug method
C:\Program Files\MATLAB\R2012a\toolbox\idelink\extensions\eclipseide\@eclipseide\load.m  % eclipseide method
C:\Program Files\MATLAB\R2012a\toolbox\idelink\extensions\ghsmulti\@ghsmulti\load.m      % ghsmulti method
C:\Program Files\MATLAB\R2012a\toolbox\idelink\extensions\ticcs\@ccsdebug\load.m         % ccsdebug method
C:\Program Files\MATLAB\R2012a\toolbox\mbc\mbctools\@mdevproject\load.m                  % mdevproject method
C:\Program Files\MATLAB\R2012a\toolbox\mbc\mbcview\@cgproject\load.m                     % cgproject method
built-in (C:\Program Files\MATLAB\R2012a\toolbox\matlab\general\load)                    % Shadowed 
>>