Problem connect

When I connect to my server RC3700 through my local network by typing I do not encounter any problem

If I connect with my IP address, after 2 or 3 connections, the> server seems blocks.
The website said that it is impossible to display the page
I use Dynamic C v 9.50 with a BL2600
Thanks for the help

my commands are:

#define MY_IP_ADDRESS “”
#define MY_NETMASK “”
#define MY_GATEWAY “”
#define MY_NAMESERVER “”
#define TCPCONFIG 0
#define USE_ETHERNET 1

or with DHCP is the same problem
#define TCPCONFIG 3
#define USE_ZHTML 1