My code is working fine on localhost but generate error on live server for importing yahoo contacts. it create , 401 error signature invalid. but working fine in localhost
There is something wrong with Yahoo API services (globally), many persons are having the same issue...
Check the following threads: http://developer.yahoo.com/forum/OAuth-General-Discussion-YDN-SDKs/OAuth-Problem-Random-401-Responses/1385737195291-2ef4f411-df40-4f77-a19c-68cfa03a0cf6