pnp4nagios can't display process monitoring graph

Hello everybody!
I use pnp4nagios to display nagios monitoring information.
I can get CPU、Mem and Disk graph properly!
But the process monitoring occured an error, the error information is:
XML file “/usr/local/pnp4nagios/var/perfdata/winserver/process.xml” not found

Under the dir, exists cup.xml mem.xml disk.xml,but I can’t find process.xml
How I do, can auto create process.xml