However, CBS was planning to operate its own television station in St. Louis alongside its powerhouse radio station, KMOX (1120 AM). The network originally won the permit to build a new station on channel 11 – the last remaining commercial VHF channel assigned to St. Louis – in January 1957. The agreement required CBS to give up its construction permit for channel 11, and the Federal Communications Commission transferred it to one of the failed applicants, a group led by St. Louis hotelier Harold Koplar, for no financial consideration. Almost immediately, the deal was held up after the St. Louis Amusement Company, another of the original applicants for channel 11, protested to the United States Court of Appeals in January 1958. The U.S. Supreme Court ultimately upheld the decision in November of that year. CBS had already taken control of channel 4's operations that March, and changed its call letters to KMOX-TV in reference to its new radio sister. The following April, channel 11 signed on as independent station KPLR-TV.