Running NW 5.1, and have a Linksys wireless router coming off of our Linksys gigabit ethernet switch. Workstation is windows XP SP2 with a D-link wireless card, client is 4.91 SP4. Can connect to internet w/ no problems. Will find tree but can't access it. Have tried workstation only login then attempted login once windows is finished its gyrations. What am I forgetting?