If you have had your Adultwork Forum signature enhanced by an admin but the message "Could not find the requested profile" is displaying its due to privacy settings within your profile.
Login and go here. Scroll down to "Other Settings" and look for:
Other Sites: Only show on AdultWork.com (make sure this is unticked)
External Advertising: Allow my Profile (make sure this one is ticked)
After a few moments your signature will now display correctly.