Where are all my groups in my email address book?

I write an email to several people, and Yahoo Mail prompts me to make a group. Good idea, so I do. Now I want to send to that same group, but where is it?
Update: OK, Jade, I tried it like that. (In fact, that's an exact description of what I have tried repeatedly.) Am I using too old a version? Should I be clicking on that funny little purple guy who shows up beside the sign in? The list on the left side of the address lists says "categories," and the... show more OK, Jade, I tried it like that. (In fact, that's an exact description of what I have tried repeatedly.) Am I using too old a version? Should I be clicking on that funny little purple guy who shows up beside the sign in? The list on the left side of the address lists says "categories," and the recently created "groups" don't show there or anywhere. They also don't come up when I start typing, the way an individual's address does. So now what?
Update 2: No, Kay, that didn't work, either. The toolbar brings up Yahoo Groups, but not the "groups" created within the mail program. I'm beginning to think it is hopeless.
Update 3: Good try, Boots, but that didn't do it either. I'm going to call it a bug in the program and forget about it.
Update 4: OK, I finally created a category for the address book. That worked. Why that other thing didn't I'll never know. I guess I'll throw this open to a vote on which of three answers that didn't work is the best.
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