According to shipping company Atlantic Caribbean Line (ACL) a bad economy has hit their Port of Fort Pierce cargo business hard. In July, the Port of Fort Pierce's only tenant, ACL, announced it laid off 34 of its 45 crew members. Now, with the Christopher Dean ship docked again, the company says it can't afford its remaining workers until more business comes, reports WPTV NewsChannel 5. Atlantic Caribbean Line trades from the east coast of Florida to the Bahama Islands and the Caribbean region…