Bodysurfer, Pavel is correct.  At the moment you are ranked as "Mailroom", but of course that will change as you post more.  "Mailroom" members are not allowed to post photos and that was the problem, but the next rank up is:  "Treasurer" and it won't be long before you are there.

From Agoracom:

Treasurer (Total Points: 250+)

1. Ability to Edit/Upload to the Following Sections of the Stock Hub:
   • Photos
   • Management Bios
   • Links Library
2. Unlimited Posting
3. Unlimited Member Rating
4. 10 Private Messages Per Day
5. Unlimited Report Violation

Mail Room

1. Limited Posting
   • Unlimited Member Rating
   • Unlimited Post Recommendations
2. Limited Report Violation

Keep posting, Bodysurfer.  It doesn't take much to get to that "Treasurer" rank and then you can post photos.  Glad you are here!

Okiedo