TACACS+ Authentication problem.

Tacacs was implemented through out the network.. Out of all peers jus one
peer i.e CISCO GSR 12140 it is not getting authenticated. Below is the
output of Debug... so please help me solving that thatk you.

an 21 15:10:29.830: AAA/AUTHEN/START (3181024263): Method=TACACS+
an 21 15:10:29.830: TAC+: send AUTHEN/START packet ver=192 id=3181024263
an 21 15:10:29.942: AAA/AUTHEN (3181024263): status = ERROR
an 21 15:10:29.942: AAA/AUTHEN/START (3181024263): Method=LOCAL
an 21 15:10:29.942: AAA/AUTHEN (3181024263): status = GETUSER
sername:
an 21 15:10:58.601: AAA/AUTHEN/CONT (3181024263): continue_login
(user='(undef)')
an 21 15:10:58.601: AAA/AUTHEN (3181024263): status = GETUSER
an 21 15:10:58.601: AAA/AUTHEN/CONT (3181024263): Method=LOCAL
an 21 15:10:58.601: AAA/AUTHEN/LOCAL (3181024263): no username: GETUSER
an 21 15:10:58.601: AAA/AUTHEN (3181024263): status = GETUSERrajesh
assword:
an 21 15:11:02.237: AAA/AUTHEN/CONT (3181024263): continue_login (user='')
an 21 15:11:02.237: AAA/AUTHEN (3181024263): status = GETUSER
an 21 15:11:02.237: AAA/AUTHEN/CONT (3181024263): Method=LOCAL
an 21 15:11:02.237: AAA/AUTHEN (3181024263): status = GETPASS
 Authentication failed.
an 21 15:11:06.672: AAA/AUTHEN/CONT (3181024263): continue_login
(user='rajesh')
an 21 15:11:06.672: AAA/AUTHEN (3181024263): status = GETPASS
an 21 15:11:06.672: AAA/AUTHEN/CONT (3181024263): Method=LOCAL
an 21 15:11:06.672: AAA/AUTHEN (3181024263): User not found
an 21 15:11:06.672: AAA/AUTHEN (3181024263): status = FAIL

-- 
With Regards,
K.V.Madhu Prateek Reddy.
Blogs and organic groups at http://www.ccie.net