IP addresses ending in ...255 are usually reserved for broadcasting, they are not assigned to clients.
Please run ipconfig /all and post the result.
Windows IP Configuration
Host Name . . . . . . . . . . . . : WFS-HP6710b
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Wireless LAN adapter WiFi:
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) PRO/Wireless 3945ABG Network Connection
Physical Address. . . . . . . . . : 00-1F-3C-5D-85-CA
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::3433:40fc:f5b8:7cf6%8(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.0.30(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Default Gateway . . . . . . . . . : 192.168.0.1
DHCPv6 IAID . . . . . . . . . . . : 50339644
DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-21-EA-F5-01-00-1F-3C-5D-85-CA
DNS Servers . . . . . . . . . . . : 192.168.0.1
192.168.0.254
NetBIOS over Tcpip. . . . . . . . : Enabled
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : HP hs2300 HSDPA Broadband Wireless Network Adapter
Physical Address. . . . . . . . . : 00-A0-D5-FF-FF-85
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Bluetooth Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Bluetooth Device (Personal Area Network)
Physical Address. . . . . . . . . : 00-21-86-05-7F-C2
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Tunnel adapter isatap.{E5B7EA44-52B7-448D-8CAB-CDD6BD169692}:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes