Trouble posting messages

Dear to whom it may concern in charge of Group, otherwise know at the "Group Commander". If I try to post to Ca… [at] yahoogroups.com, it bounces back saying I'm not a member of the group. But when I go on the group website it sure looks like I'm a subscriber. Isn't subscriber the same as a member? HELP! If this posts, then, I can only post by going to the website first. Is this true for everyone else, or, is Yahoo persecuting me for some unconstitutional reason? Also, in the olden days you could reply to a message by altering the title, as we used to, when we went off on a tangent. Doesn't seem like one can do dat anymoe. Jerry of Shpritz