This is the MPEG version of Digimaster which desn't support the App. Its successors Digimaster h.264 and Digimaster HRD do support access via iPhone / Android App.
Hello,
latest f/w is installed?
You will find it here, on the right side under "Software":
http://en.cbc-cctv.com/products/recording-equipment/digimaster-hrd-dvr/
Did you test it via UMTS or also when S2 is connected to a WLAN?