Sun 5.8 / W2K pdc

Some workstations Sun workstations, Some Windows XP Pro, Some Xp Home, Server 2000 with dns & dhcp but several systems have static ip’s — What a mess, the most recient problem is when we at a xp pro system and type ftp 192.168.x.x it times out or gets connection refused from the sun blade server. This is new Any Ideas?