Access to Message Queuing system is denied

Being an administrator should be enough to let you take ownership of the 
queue and then change permissions.  Normally "Everyone' has 'get 
permision' and 'get property' rights.  Unless someone has changed the 
queue's permissions to remove those rights the following should work for 
an administrator...

     Right click on the Queue and select Properties
     Select the Security Tab and click on Advanced
     Select the Owner tab
     Select Domain\Administrators under "Change Owner To:" and click on 
OK

Now that the Administrators group has ownership of the queue any member 
of that group has permission to change the queue's Permissions, so...

     Click on Add
     Enter Administrators and click OK
     With Administrators selected click on Receive in the Allow column
     Click on OK