Create an Alert Checker - ifInErrors_rate

Hi! I need a help, or suggestion, to create an alert checker when an error occurs in a port, like showed in this image:

I created one:

Entity Type - Port

Conditions:
ifInErrors_rate gt 1
ifOutErrors_rate gt 1

Association:
Device in ... (Network device)
Port ifType (Free) equals ethernetCsmacd

But, this alert checker, all Status are "ok"