could be due to your a new member and some sites( I forget if this is one) have rules about new members posting pictures till after they have a certain amount of posts,
this is to keep out a lot of spammers from joining and posting there agenda and NOT wishing to be a real member here!

so maybe try either reading up on rules, making some more posts/replies to other topic's and try again

also I know pictures have to be of a certain size, too big and they won;'t allow to be uploaded, but you normally get a message stating failed upload!

any how welcome to the site(smarter members /mods can add help here too) and will I assume, just give them a little time, as there are GOOD members helpful members here!