Custom nagios plugin performance data graph

Im trying to display performace graph data to for my custom nagios plugin.

The data in service is avaible but performace graph not show:

Data source output:

Integrate nagios class config:

It is possible that the “[B]” and “[s]” is the problem here.
But some more information will give you only the logfile of the PNP4Nagios (if you use the RAW edition) or the cmc.log (for enterprise edition).