That depends what you mean by "work".Should it work once I figured it out? Charter tells me it won't but hauppauge says yes.
As it says in the first post: MediaPortal only supports receiving channels that are marked as "copy freely". Any channels that Charter has protected by marking as "copy once" will not be viewable or recordable. I'm not able to tell you which (if any) channels they would be because it varies from cable provider to cable provider and market to market.