Cannot install libstdc++-4.4.4-13.el6.i686.rpm on OEL 6.8

I'm trying to install libstdc++-4.4.4-13.el6.i686.rpm but it says newer version of this package is already installed. [root@isoft Downloads]# rpm -ivh libstdc++-4.4.4-13.el6.i686.rpm warning: libstdc++-4.4.4-13.el6.i686.rpm: Header V4 DSA/SHA1 Signature, key ID 192a7d7d: NOKEY Preparing... ########################################### [100%] package libstdc++-4.4.7-17.el6.x86_64 (which is newer than libstdc++-4.4.4-13.el6.i686) is already installed* Even i cannot uninstall libstdc++-4.4.7-17.el6.x86_64. [root@isoft yum.repos.d]# yum install libstdc++-4.4.6-4.el6.i686 Loaded plugins: refresh-packagekit, security, ulninfo Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package libstdc++.i686 0:4.4.6-4.el6 will be installed --> Finished Dependency Resolution Error: Multilib version problems found. This often means that the root cause is something else and multilib version checking is just pointing out that there is a problem. Eg.: 1. You have an upgrade for libstdc++ which is missing some dependency that another package requires. Yum is trying to solve this by installing an older version of libstdc++ of the different architecture. If you exclude the bad architecture yum will tell you what the root cause is (which package requires what). You can try redoing the upgrade with --exclude libstdc++.otherarch ... this should give you an error message showing the root cause of the problem. 2. You have multiple architectures of libstdc++ installed, but yum can only see an upgrade for one of those arcitectures. If you don't want/need both architectures anymore then you can remove the one with the missing update and everything will work. 3. You have duplicate versions of libstdc++ installed already. You can use "yum check" to get yum show these errors. ...you can also use --setopt=protected_multilib=false to remove this checking, however this is almost never the correct thing to do as something else is very likely to go wrong (often causing much more problems). Protected multilib versions: libstdc++-4.4.6-4.el6.i686 != libstdc++-4.4.7-17.el6.x86_64 any one has thoughts to resolve this error.