Can't login to gw02.itversity using either putty or cygwin

Not able to login to gw02.itversity.com using both putty and cygwin. Here is the message copied from cygwin for gw02.

$ ssh venkatesh@gw02.itversity.com
venkatesh@gw02.itversity.com’s password:
Permission denied, please try again.
venkatesh@gw02.itversity.com’s password:
Permission denied, please try again.
venkatesh@gw02.itversity.com’s password:
Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).

Able to login to gw01 and following is copied from gw01.itversity.com from lab console.
[venkatesh@gw01 ~]$ ls
derby.log
[venkatesh@gw01 ~]$ ps -ef|grep -i vnc
venkate+ 15006 13385 0 23:13 pts/37 00:00:00 grep --color=auto -i vnc
[venkatesh@gw01 ~]$ ps -ef|egrep -i vnc
venkate+ 16762 13385 0 23:14 pts/37 00:00:00 grep -E --color=auto -i vnc
[venkatesh@gw01 ~]$

Please help me!

@BaLu_SaI, please have a look at this!!!