There are comments on the Intel AMT SDK download page (http://software.intel.com/en-us/articles/download-the-latest-intel-amt-software-development-kit-sdk/)to the effect that libiamtRH5_X64.a and libiamtSuSE10_X64.a are supposed to contain 64 bit binaries but they instead contain 32 bit binaries.
It turns out that this is correct. It's a problem, and we are looking into what we can do to fix it.
Fortunately, this is the storage library, and full sourcesand makefiles are provided in the SDK. So,in the meantime, if you need a 64-bit Linux version of the storage library, you can compile it yourself. If you have any problems doing so, please do let us know!
Thanks for bringing this to our attention.