Yahoo Social Sdk iphone Crashes

Hi guys,

I just tried out the Social SDK for mac/iphone.
http://developer.yahoo.com/social/sdk/objectivec/

I have placed the consumer key , secret key and application id  and follow steps as mention in http://developer.yahoo.com/social/sdk/objectivec/
The application just crashed because in line 160 of YOSSession.m, newRequestToken.key and newRequestToken.secret are both null.
 before  today it was working fine but I did not find any clue.

It was unable to get request token.May be yahoo updating their sdk.
If any body have faced same  problem  please help and reply to forum or at sanjay.chaurasia@laitkor.com

Thanks & Regards
Sanjay Kumar Chaurasia