Can't make app login with C#


#1

Dear Sir,
When we submit code with this link, we see problem:

http://twitter.com/oauth/request_token?oauth_callback=http%3A%2F%2Flogin.com%2FExtension%2FTwitter.aspx&oauth_consumer_key=1543030050-MnpCeO5Mm972fUall8YnNwvC0ejTdazZklRb5Cr&oauth_nonce=7004445&oauth_signature_method=HMAC-SHA1&oauth_timestamp=1406548621&oauth_version=1.0&oauth_signature=ztFHKCfdzt6VLXAv3T%2FHcY34wWs%3D

Can you check it? And i can’t upgrade to the current permissioning system. they ask me provide mobile phone. But when i provide my phone they said that “Sorry, we don’t have a connection to your carrier yet!”.
I’m come from Vietnam. This is my phone {redacted}. My Carrier is Vinaphone.

My Developer account:
Username: nguyenducthomc2
pass: {redacted}