Solman 7.2 SP09 - CCLM

What is a specific reason why some systems are marked as SCMON capable, why others not (only UPL) in the SAP Solution Manager Configuration: Custom Code Management. The systems are part of the same landscape - DEV system is SCMON capabable, while TST and PRD systems not:

I would suppose that all (SAP NetWeaver 7.31) systems should be SCMON capable - at least the same ST-PI version (2008_1_710 SP21) is implemented in them.

I found that info for the screenshot above comes from SM:SCMON_CONTROL job. And for the system mentioned above I can read:

Checking PRD system
SCMON extractor is configured to fetch Usage data from PRD system based on UPL ST-PI (Multi-cube)
Checking TST system
SCMON extractor is configured to fetch Usage data from TST system based on UPL ST-PI (Multi-cube)
Checking DEV system
SCMON extractor is configured to fetch Usage data from DEV system based on SCMON (ST-PI)

What can be done to be able to activate SCMON also for PRD and TST systems?