How to route internet access to new / separate subnet?

rb750gl.jpg
Receiving internet via pptp from remote location on ether5
ether 4,3, are switched, ether4 is master with DHCP server enabled (172.18.128.206/28)
DNS is enabled and set to allow remote requests (172.18.1.1)
Internet is working on the above subnet

Have created 192.168.1.254/24 subnet on ether1 with DHCP server enabled (192.168.1.254/24)
PC plugged into ether1 is receiving a lease and can ping gw on 192.168.1.254 as well as the rb on 172.18.128.206
But cannot ping / access any internet addresses

How can I access internet via 192.168.1.0/24 subnet?

Thanks

IP addressing

nebular@Nebular1] /ip address> print detail
Flags: X - disabled, I - invalid, D - dynamic 
 0   ;;; Chapmans
     address=172.18.128.4/28 network=172.18.128.0 interface=ether5-Chapmans 
     actual-interface=ether5-Chapmans 

 1   ;;; Home LAN
     address=172.18.128.206/28 network=172.18.128.192 
     interface=ether4-Home LAN-Master actual-interface=ether4-Home LAN-Maste

 2   ;;; Testing-Passthrough-HotSpot
     address=192.168.1.254/24 network=192.168.1.0 
     interface=ether1-Testing-HotSpot actual-interface=ether1-Testing-HotSpo

 3 D address=172.1.104.1/32 network=172.1.103.1 interface=pptp-INET 
     actual-interface=pptp-INET

Interfaces

[nebular@Nebular1] /interface> print
Flags: D - dynamic, X - disabled, R - running, S - slave 
 #     NAME                                               TYPE             MTU   L2MTU
 0  R  ether1-Testing-HotSpot                             ether            1500  1598 
 1  X  ether2-                                            ether            1500  1598 
 2  R  ether3-Slave                                       ether            1500  1598 
 3  R  ether4-Home LAN-Master                             ether            1500  1598 
 4  R  ether5-Chapmans                                    ether            1500  1598 
 5  R  pptp-INET                                     pptp-out         1460

Interfaces Ethernet

[nebular@Nebular1] /interface> /interface ethernet print detail
Flags: X - disabled, R - running, S - slave 
 0 R  name="ether1-Testing-HotSpot" mtu=1500 l2mtu=1598 mac-address=00:0C:42:C1:D4:45 
      arp=enabled auto-negotiation=yes full-duplex=yes speed=100Mbps 
      master-port=none bandwidth=unlimited/unlimited switch=switch1 

 1 X  name="ether2-" mtu=1500 l2mtu=1598 mac-address=00:0C:42:C1:D4:46 arp=enabled 
      auto-negotiation=yes full-duplex=yes speed=100Mbps master-port=none 
      bandwidth=unlimited/unlimited switch=switch1 

 2 RS name="ether3-Slave" mtu=1500 l2mtu=1598 mac-address=00:0C:42:C1:D4:47 
      arp=enabled auto-negotiation=yes full-duplex=yes speed=100Mbps 
      master-port=ether4-Home LAN-Master bandwidth=unlimited/unlimited 
      switch=switch1 

 3 R  name="ether4-Home LAN-Master" mtu=1500 l2mtu=1598 mac-address=00:0C:42:C1:D4:48 
      arp=enabled auto-negotiation=yes full-duplex=yes speed=100Mbps 
      master-port=none bandwidth=unlimited/unlimited switch=switch1 

 4 R  name="ether5-Chapmans" mtu=1500 l2mtu=1598 mac-address=00:0C:42:C1:D4:49 
      arp=enabled auto-negotiation=yes full-duplex=yes speed=100Mbps 
      master-port=none bandwidth=unlimited/unlimited switch=switch1

Firewall

[nebular@Nebular1] /ip firewall> export
# sep/23/2012 15:12:03 by RouterOS 5.2
# software id = ZNWQ-AGZF
#
/ip firewall connection tracking
set enabled=yes generic-timeout=10m icmp-timeout=10s tcp-close-timeout=10s \
    tcp-close-wait-timeout=10s tcp-established-timeout=1d tcp-fin-wait-timeout=10s \
    tcp-last-ack-timeout=10s tcp-syn-received-timeout=5s tcp-syn-sent-timeout=5s \
    tcp-syncookie=no tcp-time-wait-timeout=10s udp-stream-timeout=3m udp-timeout=10s
/ip firewall service-port
set ftp disabled=no ports=21
set tftp disabled=no ports=69
set irc disabled=no ports=6667
set h323 disabled=no
set sip disabled=no ports=5060,5061
set pptp disabled=no

Please print IP routes details.