Well then maybe you need to start hosting it off-site and use a link here. If shrapnel says in an FAQ, that "There may also be an overall quota limit to the number of attachments you can post to the board" that indicates that yes there is a limit and apparently you have run into it.
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"You are never to old to rock and roll if you are too young to die".--- What do you expect to be doing when you are 80?