If I may be so bold, I would like to elaborate on what wonderful Souria helped me fix. Once I set up the Ad mod I realized that they would only work for ADMIN and not my sock puppet account that was set on regular members...to make a long story short, my ads were not showing to guests or regular members. I use SMF version 1.1.7 (1.1.x) so I hope these instructions help clarify what Souria is trying to say:
GOTO
admin > members > permissions > guests (modify link) > Ad management
Now all you do is check the box that says "Enable Ads" and scroll down and press the "Save Changes" button.
Do the same thing for all member groups you wish to see the ad mod.
Now, if you dont mind, I will place some search meta at the bottom of this post so people can find it quickly:
Guests cant see my ads
Regular members cant see my ads
When I log out, I cant see my ads
Membergoups cant see my ads
I can see my ads, but guests cant
I can see my ads, but other membergroups cant
I hope this helps people out with this simple problem the same as wonderful Sourias post helped me.
P.S. My nickname is also Jerm
