Security update KB2621440 installation issue .

Question

Hi,

I have 4 WIN 2008 Std 32 bit servers. out of these 4, KB2621440 is visible for installation on only one not on other 3. I tried to download and install the patch manually however the installation fails saying that the update is not applicable to the system which makes no sense refer http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=29128 .

TIA .