Finding a collaborator, especially on the Internet, isn't terribly different than finding a serious dating relationship. Yes, I know how creepy this sounds, but if you are putting out a line for someone to join with you in the noble goal of comic creation, you may find that you have more success if you think of it in these terms.

Are you making a good impression with your posts and profiles? Does it look like you have your stuff together? Are you clearly communicating your needs and expectations? Are you looking at your work or business model honestly and asking yourself "Why would someone want to work with me?"

Think about it. Just saying. Haha