SCOM low disk space alert don't work

I created a low disk space alarm for Windows 10 client , but neither the console nor the mail received a warning.

My configuration steps are as follows:

1.     In the "rules" of the authoring interface, search for "logical Disk" see the screenshot below.

2.     In the "Monitor" of the authoring interface, search for "logical Disk" see the screenshot below.

3.     To trigger this alert in a POC environment, I do the following for a client (using Disk Manager to compress disk space).

With the above configuration, I did not receive any alerts as I expected, but in the SCOM monitoring panel, I could see a chart of disk space.

I hope you master can help me, thank you very much!