Hikvision DS-7608NI-K2 / 8P Intrusion detection alerts have stopped

Ok at a bit of a loss here, this has been working perfect for a while, now it isn't.

Basic checks

1) Email account? Sent test email to all 3 users in group. Works ok.
2) Check intrusion detection

Area Settings
Area 1 is Yellow



Settings
1
58
5

Arming Schedule all Blue

Linkage method
Send Email
Trigger Channel D1


I have also checked in Event logs nothing showing here when i jump around like a loonie in the zone of camera D1, any ideas here? Im loathed to...

Hikvision DS-7608NI-K2 / 8P Intrusion detection alerts have stopped