Hi Girl,
Give the following link a try. I use method #1 on all my installs that include a wireless router and have not encountered any problems.
http://www.broadbandreports.com/faq/8505
Also:
Try resetting the Linksys to factory defaults
Make sure the DW6000 is plugged into one of the LAN ports, not the Internet port.
Are you saving your changes to the Linksys Router after you disable DHCP and set its static IP before you leave the Linksys web page?
Are your clients set to obtain their IP address automatically?
If your clients are holding onto their previous IP, have you tried ipconfig /release and then ipconfig /renew at each client?
Good luck.