i think you should write another application for your PC also which will receive requests from your windows phone and talk with VPN connection in pc and again send results to your phone but talking directly with windows phone is not a good and practical approach!

first confirm whether your timer is starting or not some times timer itself does not starts and people start messing with the code inside timer tick event handler

Obviously java is pure object oriented programming language because even if we take example of simple stars printing program then by default classes are being inherited and objects are being created!