I want to give an access to the navigation

Dear ,

i need to access on the navigators so make a role and defined in EL expression in the navigator which one i want to show only few peoples.

EL Expression is correct but still validates gives false.

#{securityContext.userInRole['PER_HUMAN_RESOURCE_ANALYST_JOB']} (it is accepted )

#{securityContext.userInRole['PER_HUMAN_RESOURCE_ANALYST_JOB']} (it is not accepted )

Can anybody guide me

why it is happening?