The DG834 alone is all that you should need to connect wirelessly. Make sure that your wireless adapter in you pc is set to automatically request an ip address from your router as follows:
Go to control panel, networking and sharing centre, change adapter settings, right click on the wireless connection, single click on Internet Protocol version 4, click on properties. Make sure that both "obtain an ip address automatically" and "obtain dns server address automatically" are checked. Some laptops have a switch to turn wifi on and off - check to see if yours does and if so make sure it is turned on. If your pc still fails to detect the wireless signal get back to us and we can suggest further things.