There are a couple of reasons your media tagged with #hookit might not be showing up on your profile.
When a photo or video is tagged with #hookit we can only see what's coming from public accounts. To ensure your media makes it on to your Hookit profile from Instagram, be sure to set your Instagram profile to public.
One other option is selecting your Instagram connection so that all your posts are automatically posted from Instagram without using the tag. Check here to change that setting: Connected Networks
Adding the Tag After Posting the Photo
The way Hookit has the connection with Instagram set up is that only new content posted using the tag #Hookit will be posted on your Hookit profile. This means that if you go back and edit a post and add in the tag it will not be automatically posted to your Hookit profile.