Do you know much about editing your TCP/IP settings on your laptop?
If not I will explain later.
Basically what you need to do is assign your DVR with an IP Address and a subnet mask. Generally;
DVR IP: 192.168.1.100
Then you need to goto your network connection settings for your network card and enter an IP Address of the same subnet i.e.
Laptop IP: 192.168.1.XXX (XXX being any number between 2 and 254, but excluding 100)
Laptop subnet: 255.255.255.0
Once you setup the IP for each device, leaving out the default gateway, you should be able to ping the DVR from the laptop command prompt.
Start>Run>Cmd then type: ping 192.168.1.100
If successful, then you have established a connection. Then install RASPlus on the lappy and point it to the DVR IP Address.
Let me know if you need help changing the TCP/IP settings in windows.