As the title states I've got a (seemingly) seized fork.
Thing is I'm new to this particular headset and unsure wheter it needs unscrewing in order for the stem and fork to seperate.
Obviously I've loosened the allen bolt.

I tried to attach photo's, but upon submitting it tells me I'm not allowed to post links ,
so I created an imgur post: just go to imgur and add this to the url: /a/ThqAlsT

Thanks!