Cannot load phalcon on Ubuntu 16.04 with Vagrant and Virtual box

Hi, im trying to get up a virtualized system with vagrant and virtual box and right now i'm trying to install phalcon for php 7.0. but when load the phalcon application I get the error Class 'FactoryDefault' not found

I don't know where is the problem because the extension is loaded for apache2, cli and pfm with priority 50 (see attached)

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Then the so file exists on /usr/lib/php and when die the phpinfo() I can see that the framework is loaded. Please see attached and help me.

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Are you sure you use full namespace of FactoryDefault class?