Most likely the file that you use with joikuspot bouncer is not compatible with lxp's wl1251 as lxp's wl1251 uses compat.ko which brings up to a specific kernel version that joikuspot bouncer's kernel module is not understood for that specific wireless portion (due to the compat-wireless).

Your best bet is to contact the maintainer of joikuspot and see if he can port a kernel module for you to use with lxp's wl1251.