Happy to help but just need to clarify a few things:
xAuth isn't something you use when you're executing a Twitter API
resource, like posting a tweet or fetching a timeline. You do use
OAuth to sign the request. xAuth is just the variation of OAuth that
you perform to obtain an OAuth access token.
After creating a read-only application, and negotiating an access
token (by xAuth or standard OAuth), that access token is also marked
as read-only. After changing your app to read/write, you then need to
renegotiate the access token to imbue it with read/write permissions.
If you're still getting an unauthorized when trying a write (or read!)
operation, than it's likely that you're not correctly generating your
signature or signature base string when trying to access that
On Thu, Jul 22, 2010 at 10:15 PM, Georgooty varghese
> Dear Twitter,
> I have created twitter application for tv applications. I
> have used xauth authentication. First time i have created my
> application as read only. Then I haven't able to post a tweet, an
> exception occured, Exception like "UnAuthorized?. Then i changed my
> application setting access level to read and write. Then try to post
> tweet using xauth authentication, but unfunatley it didnt work.
> Whatever changes done in application, can i mail to twitter for
> enabling my application to xauth? is it need?. If anybody could u
> please help me.