[jbpm-dev] canot claim task in 6.1.CR1

hi all, i just built kie wb 6.1.CR1 and testing it. sometimes when i click "Claim" icon, it shows item claimed notification but still not show complete icon. also change status ready to in progress. it seems like the task locked .but when i click on release icon it gives error, Unexpected error encountered : org.jbpm.services.task.exception.PermissionDeniedException:User '[UserImpl:'krisv']' was unable to execute operation 'Release' on task id 3 due to a no 'current status' match please check the attached image.. regards, Akila