That was a very friendly, positive request for assistance. Now here's the bad news, and I want you to keep in mind that I bear you no animosity; I'm just laying out the brutal facts the way they exist.
You posted this in the wrong subforum. The "Dogpile" sub is the place where requests for assistance/contractors go. This is a minor quibble, but it suggests that you didn't take the time to understand the layout of the forum, which may be off-putting to some.
You'd be better served to start illustrating your story on your own, or to hire a paid artist to do so. Offering artists—especially the busy professionals here—an opportunity to illustrate your complete, fully fleshed out story with no mention of payment is often perceived as an insult to the artists' craft. (cf the above-mentioned subforum for examples)
You posted no examples of your script or even a synopsis of your story. It's easy to understand that one might be afraid someone else might steal their idea, but that fear must be weighed against the necessity of allowing potential collaborators the knowledge of what they'd be agreeing to.
There is an excellent post with guidelines for requesting a collaborator/artist-for-hire here
. You should probably read it.
_________________Casual Notice--commentary, comics and an appreciation for snappy hats.