Can not access server's on public ip's

Question

Guys,
We have a core switch with two fibre lines connecting us through two different ISP's to the internet. These ISP's have provided us with a range of public ip's each. We have a few routers on some of these ip's and they are working fine and we can access them externally (telnet and ssh).
I am now busy setting up two servers, one on each ISP with their respective public ip's. I can ping the core switch and the isp gateways from the servers and from the core. I have triple checked that there are no active firewalls and I can see that the http ports are open and accessible (TcpView). But for the life of me I can not access those servers externally. I am now completely stumped. I do suspect though that it is a routing problem through the core.
And herewith the relevant parts from my Core switch's config:
version 12.2
service tcp-keepalives-in
service tcp-keepalives-out
hostname SMS-CORE
no aaa new-model
clock timezone ZAR 2
no ip source-route
mls netflow interface
mls cef error action reset
spanning-tree mode pvst
spanning-tree portfast edge default
vlan internal allocation policy ascending
interface FastEthernet3/25
 switchport
 switchport access vlan 153
 switchport mode access
interface FastEthernet3/31
 switchport
 switchport access vlan 153
 switchport mode access
interface FastEthernet3/35
 switchport
 switchport access vlan 153
 switchport mode access
interface FastEthernet3/37
 switchport
 switchport access vlan 20
 switchport mode access
interface FastEthernet3/47
 switchport
 switchport access vlan 20
 switchport mode access
interface FastEthernet3/48
 ip address 192.168.2.2 255.255.255.252
interface Vlan1
 no ip address
interface Vlan20
 ip address PUBLIC_IP1 255.255.255.240
interface Vlan153
 ip address PUBLIC_IP2 255.255.255.248
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.2.1
ip local policy route-map PUBLIC
access-list 100 permit ip ISP2_NETWORK 0.0.0.7 any
access-list 101 permit ip ISP1_NETWORK 0.0.0.15 any
route-map PUBLIC permit 10
 match ip address 100
 set ip default next-hop PUBLIC_GW2
route-map PUBLIC permit 20
 match ip address 101
 set ip default next-hop 192.168.2.1
Any  ideas guys, I am at my wits end here ....
Thanks as always !

Answer 1

Hi Oliver , 
       Have you got IP Address assigned to your server from the same segment ?? like for server 1 
ip address PUBLIC_IP1 255.255.255.240
and for server 2 
ip address PUBLIC_IP2 255.255.255.248
What is the gateway IP address assigned for both servers .
HTH
Sandy