Reading simple json file

[jamal sasha]

Hi,

I am trying to read simple json data as:
d =LOAD 'json_output' USING
JSONLOADER(('ip:chararray,_id:chararray,cats:[chararray]');
But I am getting this error:
2013-09-23 14:33:17,127 [main] ERROR org.apache.pig.tools.grunt.Grunt -
ERROR 1070: Could not resolve JSONLOADER using imports: [,
org.apache.pig.builtin., org.apache.pig.impl.builtin.]
Details at logfile: /home/user/mohit/pig-0.11.1-src/pig_1379969371188.log


What am i missing?