How to add Zend Guard Run-time in wamp

Question

Zend Guard Run-time support missing!

One or more files on this web site were encoded by ZendGuard and the required run-time support is not installed or properly configured.

When I try to run some script encrypted with zend gurad I am getting this error.
Please help me to resolve this.

i have encrypted my php code using zend guard , also i downloaded and added zend guard dll, changed the php.ini as follows

zend_loader.enable=1
zend_loader.disable_licensing=0
zend_extension="c:/wamp/bin/php/php5.3.8/zend_ext/ZendLoader.dll"