can't ping form computer

in CCNA & CCENT
Guys I'm playing around with learning static routes and soon rip and ospf. I have 3 routers that I'm using in my test lab. I would like to know why would you be able to ping a pc form the router but not from the computer. Basically I'm consoled in to a router if I ping the system from the console everything works fine but if I ping it from the computers command prompt its a no go. If this is not a info I will draw a network diagram and link it to my website.
Comments
-kyle
Yankee
type
route print
from a dos prompt
"default gateway" is synonomous to a default route.
where do i sent packets when the destination isn't in the arp table ?
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
Z:\>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 0d 56 0f 8b 07 ...... Intel(R) PRO/1000 MTW Network Connection - Packe
t Scheduler Miniport
===========================================================================
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
0.0.0.0 0.0.0.0 172.16.6.1 172.16.6.194 20
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
172.16.6.0 255.255.255.0 172.16.6.194 172.16.6.194 20
172.16.6.194 255.255.255.255 127.0.0.1 127.0.0.1 20
172.16.255.255 255.255.255.255 172.16.6.194 172.16.6.194 20
224.0.0.0 240.0.0.0 172.16.6.194 172.16.6.194 20
255.255.255.255 255.255.255.255 172.16.6.194 172.16.6.194 1
Default Gateway: 172.16.6.1
===========================================================================
Persistent Routes:
None
Z:\>
form sher zamin khan