Cannot load Zend/IonCube "File not an ELF object"

[unix3]

HI, I tried installing seperately Zend Optimizer, or IonCube ... but the 
error that I get is

Failed loading /var/www/usr/lib/php/ZendExtensionManager.so:  File not 
an ELF object
Failed loading /var/www/usr/lib/php/ZendOptimizer.so:  File not an ELF 
object

The error is the same for IonCube just that the path changes obviously.

PLease note iam running inside the chroot. Iam running on an amd64 
GENERIC kernel.

Could it be because iam using amd64  (4.4) instead of the i386?


Thanks.