Binary installation fails from yum

When I do as the instructions say, and install from yum, two of the objects do install, the server and shared, but the third, client, fails.

Can somebody help please? This is RHEL 6.1 fully updated.

[root@superserver etc]# yum -y install Percona-Server-client-55-5.5.16-rel22.0.189.rhel6.x86_64
Loaded plugins: product-id, refresh-packagekit, rhnplugin, subscription-manager
Updating Red Hat repositories.
Setting up Install Process
Resolving Dependencies
–> Running transaction check
—> Package Percona-Server-client-55.x86_64 0:5.5.16-rel22.0.189.rhel6 will be installed
–> Processing Dependency: Percona-Server-shared-55 for package: Percona-Server-client-55-5.5.16-rel22.0.189.rhel6.x86_64
–> Running transaction check
—> Package Percona-Server-shared-55.x86_64 0:5.5.16-rel22.0.189.rhel6 will be installed
–> Finished Dependency Resolution

Dependencies Resolved

============================================================ ============================================================ ============================================================ =======
Package Arch Version Repository Size
============================================================ ============================================================ ============================================================ =======
Installing:
Percona-Server-client-55 x86_64 5.5.16-rel22.0.189.rhel6 percona 6.6 M
Installing for dependencies:
Percona-Server-shared-55 x86_64 5.5.16-rel22.0.189.rhel6 percona 779 k

Transaction Summary
============================================================ ============================================================ ============================================================ =======
Install 2 Package(s)

Total size: 7.4 M
Installed size: 32 M
Downloading Packages:
Running rpm_check_debug
Running Transaction Test

Transaction Check Error:
file /usr/lib64/libmysqlclient.so from install of Percona-Server-shared-55-5.5.16-rel22.0.189.rhel6.x86_64 conflicts with file from package Percona-Server-shared-51-5.1.59-rel13.0.325.rhel6.x86_64
file /usr/lib64/libmysqlclient_r.so from install of Percona-Server-shared-55-5.5.16-rel22.0.189.rhel6.x86_64 conflicts with file from package Percona-Server-shared-51-5.1.59-rel13.0.325.rhel6.x86_64
file /usr/lib64/mysql/plugin/libfnv1a_udf.a from install of Percona-Server-shared-55-5.5.16-rel22.0.189.rhel6.x86_64 conflicts with file from package Percona-Server-shared-51-5.1.59-rel13.0.325.rhel6.x86_64
file /usr/lib64/mysql/plugin/libfnv_udf.a from install of Percona-Server-shared-55-5.5.16-rel22.0.189.rhel6.x86_64 conflicts with file from package Percona-Server-shared-51-5.1.59-rel13.0.325.rhel6.x86_64
file /usr/lib64/mysql/plugin/libmurmur_udf.a from install of Percona-Server-shared-55-5.5.16-rel22.0.189.rhel6.x86_64 conflicts with file from package Percona-Server-shared-51-5.1.59-rel13.0.325.rhel6.x86_64