TracJsGanttPlugin doesn't show anything

[duarte.diegod@…]

I tried to install the TracJsGanttPlugin and follow all the instructions on the main page. However, when I try to invoke the plugin, using the following instruction:

[[TracJSGanttChart(milestone=BACEN)]]

It just renders a red box with the message: "Error: Macro TracJSGanttChart(milestone=BACEN) failed" and no more information. I commented all fields that are not being used. This are the configuration:

[trac-jsgantt]
# To work with Timing and Estimation for percent complete
fields.estimate = estimatedhours
fields.worked = totalhours
# Each unit in estimate is 1/8 of a day
days_per_estimate = 0.125
# To work with Master Tickets for dependencies
#fields.pred = blockedby
#fields.succ = blocking
# To work with Subtickets for parent/child relationships
#fields.parent = parents
# Custom fields for start and due dates
#fields.start = userstart
#fields.finish = userfinish
date_format = %Y-%m-%d
milestone_type = milestone

I also tried to uncomment fileds.start and fields.finish, but the only chance is that the red error box show "userstart" as and additional error message.