Hi csolano,
I think until you get to a certain number of posts, you're not allowed to post pictures into a thread perhaps (I think it's probably about 10 posts) - this is an attempt to stop spammers.
I think, however, if you use a photo sharing service like flickr or picasa etc. you can just link to the images in your post and that should work.
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http://www.orchidboard.com/community...ng-photos.html might help you as well