Study is a Phase 2b, double-blind, placebo-controlled study of the safety and efficacy of AA4500 for the treatment of adhesive capsulitis of the shoulder. To be eligible for treatment, a subject must have unilateral idiopathic adhesive capsulitis of the shoulder with restricted range of motion in the affected shoulder for at least 3 months but not more than 12 months. Subjects will be screened for study eligibility within 28 days before injection of study drug.