I have a sde-4001n Samsung DVR system I am having a terrible time trying to get an android app that will connect to the unit. I can use internet explorer on a windows PC to view cameras so i know my router and network settings are good. I have tried the ipolis app and the wisenet app. i can connect with the ipolis app but i never get any video. I tried to contact samsung and wisenet but neither responded to my emails . Does anyone know what app would work for the system? I am ready to throw it out. Very frustrating Thank You in advance