OK, Thanks. Well, I do that and it's not set for that, but when I do set that and click "Save", it gives me an error at the top of the page with a pink background that says: "Invalid Google Talk email: original:" and it reverts back to not having that.
I Googled it and see that a lot of other people are reporting this same error when trying to set up the same feature, for at least a year now. One person said to delete the chat, add it back, then try again, but that doesn't work either. Seems that it only saves that setting under these conditions:
1. I have it forwarded to a real phone number.
2. On that real number, I set those settings for v-mail.
But, that doesn't do me any good as I have no real number obviously, since I'm using the Obi110 box. Under no conditions will it save it for the chat.