I've been playing retail for a good while, enough that my ID under 1000 anyway. As the title suggests out of the blue I've begun having an error when I load blockland that my key cannot be validated. I've had this problem for no noticable reason and I've done everything I can think of including re-installing blockland and disabling my firewall and even my anti-virus, none of which have had any effect. I've re-entered my key more times than I can remember and it just refuses to authenticate it.
Has anyone experienced this or can anyone tell me what I can do to get my game working again?