Alerts in thing are not triggering
i'm using mqtt thing with some data from mqtt server in thingworx. i made two alerts in mqtt thing one is for above 50 and one is for below 50. when sensor data come from mqtt server and it is either above 50 or below 50 this alerts does not trigger. but when disconnected from mqtt server and set the thing property by manually above 50 or below 50 it triggers alerts. strange but is happening with me. please help with this.

