Practical (not theoretical) Subnetting 192.168.0.0/25

I have a Netgear WGR614v7 router (wireless disabled).

Hosts in both subnets should have inteet access but should not be able to ping hosts across the subnets.

I want to split my private class c network into two subnets:

1. First Subnet:
   • Subnet Mask: 255.255.255.128
   • Subnet Address: 192.168.0.0
   • Broadcast Address: 192.168.0.127
   • Host range 192.168.0.1 - 192.168.0.126
   • Default gateway 192.168.0.1
2. Second Subnet:
   • Subnet Mask: 255.255.255.128
   • Subnet Address: 192.168.0.128
   • Broadcast Address: 192.168.0.255
   • Host range: 192.168.0.129 - 192.168.0.254
   • Default Gateway: 192.168.0.1 (I think this is wrong?)

Router Configuration

Router configuration ("LAN IP Setup" tab on the WGR614v7 - looks alot like this http://interface.netgear-forum.com/WGR614v6/start.htm):

LAN TCP/IP SETUP

• IP Address: 192.168.0.1
• IP Subnet: Mask 255.255.255.128 (Maybe I should change this on the router to /24 instead of /25 and put /25 masks on the hosts??)
• RIP Direction: None
• RIP Version: Disabled
• Use Router as DHCP Server: Enabled
• Starting IP Address: 192.168.0.50
• Ending IP Address: 192.168.0.99
• Address Reservation: None

The workstations

I have a workstation in the 1st network (192.168.0.51 via DHCP) which has inteet access no problem.

A workstation in the 2nd network (192.168.0.129 via static IP) can't reach the inteet nor can it ping the router (192.168.0.1).

The Main Question

Can you please help me find out what I'm doing wrong? I am trying to find out why I can't put that second workstation (192.168.0.129) on the second subnet and access the inteet from it or ping the router.

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