Cannot access folders from Windows XP

Can you post the network settings for both your NAS and computer? For the computer, open a command prompt and type ipconfig /all and paste the output here. For example, here are my settings:

C:\Users\dbott>ipconfig /all

indows IP Configuration

  Host Name . . . . . . . . . . . . : Omega-Win7
  Primary Dns Suffix  . . . . . . . :
  Node Type . . . . . . . . . . . . : Hybrid
  IP Routing Enabled. . . . . . . . : No
  WINS Proxy Enabled. . . . . . . . : No

thernet adapter Local Area Connection:

  Connection-specific DNS Suffix  . :
  Description . . . . . . . . . . . : Broadcom 440x 10/100 Integrated Controlle

  Physical Address. . . . . . . . . : 00-15-C5-0C-xx-xx
  DHCP Enabled. . . . . . . . . . . : Yes
  Autoconfiguration Enabled . . . . : Yes
  Link-local IPv6 Address . . . . . : fe80::6125:9c4b:4222:f94b%11(Preferred)
  IPv4 Address. . . . . . . . . . . : 192.168.1.199(Preferred)
  Subnet Mask . . . . . . . . . . . : 255.255.255.0
  Lease Obtained. . . . . . . . . . : April-28-11 3:20:23 AM
  Lease Expires . . . . . . . . . . : June-15-47 11:32:09 PM
  Default Gateway . . . . . . . . . : 192.168.1.1
  DHCP Server . . . . . . . . . . . : 192.168.1.1
  DHCPv6 IAID . . . . . . . . . . . : 234886597
  DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-12-C5-90-01-00-15-C5-0C-xx-xx

  DNS Servers . . . . . . . . . . . : 192.168.1.1
  NetBIOS over Tcpip. . . . . . . . : Enabled

Do the same for your NAS. The settings are under Frontview > Network > Interfaces. I need the IP address, subnet mask, gateway and DNS settings (the last 2 may be under "Global Settings").