mcrypt & centos

[root@ec2-50-17-157-160 /]# yum install php-mcrypt.x86_64
Loaded plugins: fastestmirror
Repository base is listed more than once in the configuration
Repository updates is listed more than once in the configuration
Repository addons is listed more than once in the configuration
Repository extras is listed more than once in the configuration
Repository centosplus is listed more than once in the configuration
Repository contrib is listed more than once in the configuration
Loading mirror speeds from cached hostfile
 * addons: mirror.atlanticmetro.net
 * base: mirror.batblue.com
 * epel: mirror.symnds.com
 * extras: mirror.rackspace.com
 * updates: centos.mirror.nac.net
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package php-mcrypt.x86_64 0:5.1.6-15.el5.centos.1 set to be updated
--> Processing Dependency: php-api = 20041225 for package: php-mcrypt
--> Processing Dependency: php >= 5.1.6 for package: php-mcrypt
--> Running transaction check
---> Package php.x86_64 0:5.1.6-27.el5_5.3 set to be updated
--> Processing Dependency: php-cli = 5.1.6-27.el5_5.3 for package: php
---> Package php-common.x86_64 0:5.1.6-27.el5_5.3 set to be updated
--> Running transaction check
---> Package php-cli.x86_64 0:5.1.6-27.el5_5.3 set to be updated
--> Processing Conflict: php53-common conflicts php-common
--> Finished Dependency Resolution
php53-common-5.3.3-1.el5_6.1.x86_64 from installed has depsolving problems
  --> php53-common conflicts with php-common
Error: php53-common conflicts with php-common
 You could try using --skip-broken to work around the problem
 You could try running: package-cleanup --problems
                        package-cleanup --dupes
                        rpm -Va --nofiles --nodigest