Mirth_agent doesn't work

Hello,

We tested Mirth_agent on other mirth server 3.12.0 and works.

<<<mirth_channel:sep(124)>>>
VC150 - ORU vc150 to HIS - Stnd|aa376078-adc6-41ca-afed-2893b2a3e5bb|STARTED|Idle|0|0|0|0|0
VC150 - HL7 Query-Response to HIS|672867bc-ae87-453a-b5e1-78dae0d83510|STARTED|Idle|0|0|0|0|0
<<<mirth_server:sep(124)>>>
30aab4c0-46ec-4f02-b755-12e56606dd5f|False|False|-|3.12.0

What is the result Mirth_agent when channel is disabled ? According to our testing, it ends up with an error, as in the case I wrote about above, so json is valid.

thanks,regards