how to update Office 2010 to service pack 2 when the version number is a pre-release version number

I need to update my office 2010 to service pack 2 but the update gives me a message "not the version expecting" I looked up my version (14.0.4734.1000) and found it's a version prior to the original release version. Is there a way to update my version to a release that can be updated. I'm ruing windows 7 profession (64 bit) and have installed Office 2010 as (32 bit).

Any help would be greatly appreciated