Parent Attachment

Im trying to parent the flag model to the player ( !activator ) and give it the "flag" attachment.
Parenting works but whenever i try to set the attachment to "flag" i get this error
ERROR: Tried to SetParentAttachment for entity prop_dynamic (keycard_parent), but it has no attachment named flag.

I checked and all the playermodels and all of them have the flag attachment
ˇˇˇˇ
$attachment "flag"

Anything im doing wrong?

 

the prop probably needs an attachment point too, not just the thing you're attaching it to.

 

Tried doing the sout model itself but it gives the same error.
The only problem I can see is that maybe active players dont give out their attachment since it works if i parent it to a player model itself but i dont know if thats true