I am trying to make my DVR wireless to connect to my router any suggestions?

What kind of DVR is it? Is it a Tivo? If so, you should be able to do that fairly easily with a wireless adapter from Tivo and using the network settings on the TV itself (or some of the adapters require connecting to a computer for setup).

We need to also know a little about your wireless such as what type of encryption is used and what make and model your router is will help greatly too.

It is a Lorex DVR and I am using a Linksys router model wrt120n with WEP security