Shoutbox

I have no idea why but I have windows live 8.5 and the newest messenger plus which is 4.7 (both from the original sites). Msn works fine but Messenger Pluss doesn't work at all, it worked once as soon as I installed it then stopped working th enext time i signed in. I have uninstalled and re-installed messenger plus Live! a numerous amount of times and no luck. What can I do so Messenger Plus Live! can work!! Please this is so frustrating!!!

Thanks!