spain bus rant

so i am trying to book a bus from cadiz to fuengirola. i have the site. but i can't seem to book. ugh! it keeps on saying this:

"Lamentamos informarle que las fechas que ha seleccionado para el viaje salen del plazo temporal admitido por la empresa que ofrece los trayectos.
Por favor, intente nuevamente con fechas de viaje más próximas."

i can understand it. but, the website keeps on saying that no matter what date i plug in. argh! anyone out there who can help?!?!?!