Make sure that an access list or conduit exists in order to permit access to the global IP address from the outside.
These are examples of an access list and conduit :
access-list inbound permit tcp any host 188.8.131.52 eq 80
conduit permit tcp host 184.108.40.206 eq 80 any
Check for Address Resolution Protocol (ARP) conflicts if the server was moved from one side of the PIX to another, or if the global address is or was used by a different device. In order o see if there are conflicting ARP entries in the PIX, enter the show arp command. In order to clear the ARP table in the PIX, enter the clear arp command.