no gw ping

[luis@aztlan.fb10.tu-berlin.de (luis)]

hello:

i have a trouble :-)

in ppp, i get with ifconfig ppp0:

ppp0      Link encap:Point-to-Point Protocol  
          inet addr:195.243.107.196  P-t-P:192.168.100.254  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:132 errors:0 dropped:0 overruns:0 frame:0
          TX packets:144 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10 

and with route -e:

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
192.168.100.254 *               255.255.255.255 UH        0 0          0 ppp0
localnet        *               255.255.254.0   U         0 0          0 eth0
default         192.168.100.254 0.0.0.0         UG        0 0          0 ppp0

seems ok, but, when i try to ping my gateway, i get:

PING 192.168.100.254 (192.168.100.254): 56 data bytes

--- 192.168.100.254 ping statistics ---
122 packets transmitted, 0 packets received, 100% packet loss

what thing i must be doing bad?

thanks all for your help