Notify user that a new ticket has been created via script (Notify class)

Hi, 
I´m currentlly trying to notify a user in the system when a new ticket has been created and assigned to the user with the Notify class and it´s ticket related functions. 
However i don´t get any notifications when i try to use the functions "SendNewTicket/SendNewTicketMessage" which i would like to have since they automatically include the link to the ticket. I receive notifications when i use the function "SendCustomMessage". 

I have set up my user to a new category where the requests should be handed out so my user becomes the owner directly, but the notification is not appearing. 
Is there something i´m missing in order for this to work? (I have checked out an older forum post regarding this problem but the fixes from that one doesn´t seem to work here.)

Thanks in advance
Fredrik