Checkbox "Roles that can submit this webform" cannot be checked

Are you still experiencing this problem? I haven't ever heard of this problem occurring. It sounds like it might be a module conflict or a problem with your installation of Webform. When saving your data, does the information get saved into the "webform_roles" database table?

Without more information, I don't think I can answer this question, but at the same time this is so old I'm not sure the problem is still happening. I'm going to mark this "can't reproduce", but if you're still experiencing this problem please move its status back to "active".