Trigger creation for -->Couldnt connect to server message

[Dan]

hi All


We have this expression {my.xxx.com:web.test.time[WWWSTAGE,stage-VIP,resp].last(0)}>10s and works fine and gives alerst for response time but if i take the host down or if it has gone down i do not get any alerts

tried the below 3 expression and it said expression not valid ,could you please let me know where i went wrong

({WWWSTAGE:web:status. last( 0 ) } = 2) & ({stage-VIP:status. nodata( 300 ) } = 1)
({stage-VIP:web:status. last( 0 ) } = 2) & ({stage-VIP:status. nodata( 300 ) } = 1)
({WWWSTAGE:web:status. last( 0 ) } = 2) & ({WWWSTAGE:status. nodata( 300 ) } = 1)

Thanks in advance
Dan