Ssh DenyUsers – not working with the RHEL6 setup

I want to deny access to a single user (test1 ) from ip – 192.168.122.16. So this is what I have added the following line in /etc/ssh/sshd_config

DenyUsers test1@192.168.122.16

Then have restarted sshd after making changes to the sshd_config. But after this change in the conf file all the users from that IP after getting a permission denied message. Instead I want to deny access only to a single user 'test1'.

sshd_config man pages states as follows:

DenyUsers

This keyword can be followed by a list of user name
patterns, separated by spaces. Login is disallowed for user names
that match one of the patterns. Only user names are valid; a
numerical user ID is not recognized. By default, login is allowed for
all users. If the pattern takes the form USER@HOST then USER and HOST
are separately checked, restricting logins to particular users from
particular hosts. The allow/deny directives are processed in the
following order: DenyUsers, AllowUsers, DenyGroups, and finally
AllowGroups.

I am particularly intereted in restricting only the user 'test1' from the above IP. But I am ok with the user doing a login from a diffirent IP. Anything I am missing here ?