Hello Rai,
you are using the Itanium version of sapjco3.dll, this is the wriong version, you need to download the JCo version for x86_64 (64bit x86) from the download page. Then it will work.
Best regards,
Markus
P.S.: One more side remark: You violated the installation instructions of JCo, which prohibit to store the sapjco3.dll in the system32 folder.