coronagrey

I have a pc connected to a netopia 3347nwg router which gets internet access from a DSL line. I am trying to connect remotely. Since the computer has a router assinged IP, what IP do i put into the client software to connect to the pc that the dvr card is installed on? Its not working with the main static IP. The software is called Digital monitor system came with the DVR card from ebay. Thank You