Network problem windows xp

Hello,

i have this computer which have the same configuration as others, this computer takes an ip, mask, gateway...etc of the same of others using DHCP.

ipconfig /all for this computer wich have a windows xp professional SP 3:

Connection-specific DNS Suffix . : 192.168.3.1

Description . . . . . . . . . . . : Dell Wireless 1397 WLAN Mini-Card

Physical Address. . . . . . . . . : 90-4C-E5-3B-2C-C0

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

IPv4 Address. . . . . . . . . . . : 192.168.3.101

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Default Gateway . . . . . . . . . : 192.168.3.1

DHCP Server . . . . . . . . . . . : 192.168.3.1

DNS Servers . . . . . . . . . . . : 8.8.8.8

ipconfig /all for another computer wich have a windows 7:

Connection-specific DNS Suffix . : 192.168.3.1

Description . . . . . . . . . . . : Dell Wireless 1390 WLAN Mini-Card

Physical Address. . . . . . . . . : 00-1F-3A-11-91-36

DHCP Enabled. . . . . . . . . . . : Yes

Autoconfiguration Enabled . . . . : Yes

Link-local IPv6 Address . . . . . : fe80::6d0b:f185:ef0d:5ba1%11(Preferred)

IPv4 Address. . . . . . . . . . . : 192.168.3.102(Preferred)

Subnet Mask . . . . . . . . . . . : 255.255.255.0

Lease Obtained. . . . . . . . . . : Monday, January 09, 2012 8:00:27 AM

Lease Expires . . . . . . . . . . : Tuesday, January 10, 2012 8:00:27 AM

Default Gateway . . . . . . . . . : 192.168.3.1

DHCP Server . . . . . . . . . . . : 192.168.3.1

DHCPv6 IAID . . . . . . . . . . . : 218111802

DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-14-D3-53-E3-00-1C-23-8A-DC-48

DNS Servers . . . . . . . . . . . : 8.8.8.8

NetBIOS over Tcpip. . . . . . . . : Enabled

i have a firewall hardware, and i give the xp computer the privileges to access internet.

so the problem is why the xp computer cant connect to the internet, on this network but it connects outside.

another thing i want to add is whenever i try to ping the gateway it gives me request timed out.

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