Paypal_Lib + Monthly Subscription

[eluser]bondjp[/eluser]
Ok, did some more digging and found that i get this error:
Fatal error: Call to undefined method Paypal_Lib::initialize() in /home/availabl/public_html/app/controllers/membership.php on line 109

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Code:

$this->paypal_lib->initialize($config); //set paypal cmd for subscriptions

Only on my live site, my localhost does the processing ok and i can get the order complete in sandbox.

Can someone tell me why it's giving me this error only on my live site?
Thanks.