Android Question Android Wear & Libraries

Hi, I'm testing source code in Sony Smartwatch and all works fine but when I add reference to OkHttp or OkHttpUtils2 libraries (only reference not code) the app do not install in the Smartwatch. If I remove the references, it install OK. I need to get some values from PHP server (with the smartwatch, the mobile in my case will be off in that moment) so I need to use that libraries. Why only adding, the app refuse to install on the smartwatch?

Thanks