route not found !!

[gaurav]

Hi List,
          I have two machines in office one on fc3 and other xp (both on 
dhcp)
if I try to ftp any public or internet site  from fc machine I get error
route not found

 whereas it works ok on ther XP machine

when try to add default gateway (or any of the routes i found XP routing 
table) I get following error
SIOCADDRT: File exists

Pl tell what to next ......

Regards.
Gaurav
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 0d 61 4c 61 38 ...... Realtek RTL8139 Family PCI Fast Ethernet 
NIC - Packet Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0    165.28.66.126    165.28.66.59       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
      165.28.66.0  255.255.255.128     165.28.66.59    165.28.66.59       20
     165.28.66.59  255.255.255.255        127.0.0.1       127.0.0.1       20
   165.28.255.255  255.255.255.255     165.28.66.59    165.28.66.59       20
        224.0.0.0        240.0.0.0     165.28.66.59    165.28.66.59       20
  255.255.255.255  255.255.255.255     165.28.66.59    165.28.66.59       1
Default Gateway:     165.28.66.126
===========================================================================
Persistent Routes:
  None
[root at mars-attack ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
165.28.66.0     0.0.0.0         255.255.255.128 U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         165.28.66.126   0.0.0.0         UG    0      0        0 eth0

[root at mars-attack ~]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 00:0C:F1:94:EA:7C
          inet addr:165.28.66.39  Bcast:165.28.66.127  Mask:255.255.255.128
          inet6 addr: fe80::20c:f1ff:fe94:ea7c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2285581 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1664925 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1171253088 (1.0 GiB)  TX bytes:415171411 (395.9 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:65822 errors:0 dropped:0 overruns:0 frame:0
          TX packets:65822 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:93373622 (89.0 MiB)  TX bytes:93373622 (89.0 MiB)

sit0      Link encap:IPv6-in-IPv4
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)