Getting line of sight trigger to work

[Superbabs84321]

I have difficulties getting a line of sight trigger to work.

Currently I have a Player-Proximity Trigger firing a event X which activates an AIscript.

In addition I want a line of sight trigger to activiate the AIscript but I can't get it to work. I placed a line of sight trigger in the open (bHidden set to false so I can see it). Furthermore, at the event tab I set the Event the trigger fires to event X. Currently, the values in the LineofSightTriggerTab are as follows:

bEnabled = True
MaxViewAngle = 50.00
MaxViewDistance = 3000.00
SeenActorTag = none

I have walked to the Trigger (well witin the 3000 units range) and watched at it, but it doesn't activiate the script. What did I do wrong?

THanks in advance!