15. Subject received topical therapy within 14 days prior to the first dose administration (including but not limited to topical corticosteroids, topical retinoids or vitamin D analog preparations, tacrolimus, pimecrolimus, or anthralin). Exceptions: low potency corticosteroids will be allowed as background therapy for treatment of the face, axillae and groin in accordance with the manufacturers' suggested usage during the course of the study. Subjects with scalp psoriasis will be permitted to use coal tar shampoo and/or salicylic acid scalp preparations on scalp lesions. Eucerin® cream (the standard emollient for this study) will also be permitted for body lesions only. Subjects must not use these treatments within 24 hours prior to each check-in.