emr123 - 2014-01-02

Hi, i download HealthVault PHP Library and run the script index.php. But it shows error like this

require_once(Crypt/HMAC.php): failed to open stream: No such file or directory
Line 19 using require_once() in /Applications/MAMP/htdocs/spot/healthvaultphp-code-46-trunk/classes/health_vault_helper.php

That HMAC.php not exist in directory. How it can solve?
Thanks.