I got the RequestToken Information by using "https://login.yahoo.com/WSLogin/V1/get_auth_token". By using that request token if send request with "https://api.login.yahoo.com/oauth/v2/get_request_token" then i am getting 401 unauthrozed error.

I sent below information

"https://api.login.yahoo.com/oauth/v2/get_request_token?oauth_consumer_key=dj0yJmk9YnhCWDdGVlRuUXF6JmQ9WVdrOVVHSmxkamRqTm1VbWNHbzlNVEF5T
lRReU5qTTJNZy0tJnM9Y29uc3VtZXJzZWNyZXQmeD1lYQ&oauth_nonce=2808176&oauth_signature=4e42db602957d2d970d783004566bdd5f43631a8%26drer_Idu3Aaox.OxPv1.kx8rBvnnVnE8Nnh6hztNS2Dm3fLUV4JHWymdLBZ2oWGzUkfUfW7MSuppXI
8LEJ.T3HDWPUO7ImyLj5GDHhEiMA_2F7tmyNNeMGgrp_1O7kb.H8ziUuBh2lsxInPYmarKLyjwX6QaDnP
92.9OeK8Mmxer9r7H79DZaFkvobs5U85cE321EIiMVoBGrarQ.9Y8l6hhUTY77cps.V_Y9joi&oauth_signature_method=PLAINTEXT&oauth_timestamp=1295983933&oauth_token=drer_Idu3Aaox.OxPv1.kx8rBvnnVnE8Nnh6hztNS2Dm3fLUV4JHWymdLBZ2oWGz
UkfUfW7MSuppXI8LEJ.T3HDWPUO7ImyLj5GDHhEiMA_2F7tmyNNeMGgrp_1O7kb.H8ziUuBh2lsxInPYm
arKLyjwX6QaDnP92.9OeK8Mmxer9r7H79DZaFkvobs5U85cE321EIiMVoBGrarQ.9Y8l6hhUTY77cps.V
_Y9joi&oauth_version=1.0"

Please let me know, if i am doing wrong.