sentences:  In November 2008, due to low advertising revenues, Bynum opted not to renew his lease with Birach; on November 7, 2008, the station began carrying Regional Mexican programming, moved from WMJH.Bynum soon relaunched "Smooth Vibes" as an online-only station free from music licensing fees.As "La Poderosa," the station became the exclusive Regional Mexican station in West Michigan, as former competitor stations WYGR and WNWZ have switched to other formats.