New here so im not quite shure if this is the right place to post this but i have a kurzewiel mart 10 grand essembke that my grandma bought in the late 90s. I heard that these can be used as a type of player piano by downloading thr midi songs and plaing them on the piano i have never mess with anything much other than the keys but when i went to attempt to load it i pressed load songs it did nothing this is the only button that does not work. am i doing something wrong or is it a bas button?