TMS570 + lwIP library connect problem

Hi everyone. i am newbie at tms570 and lwIP library. and i try to connect to ethernet with my board. I use TMS570LS31X HDK. I downloaded lwIP and imported to my solution at CCS. i compiled correctly but when i started the program, the mcu cannot communicate with my PC. I changed just 1 line at code. That is at lwIPinit function cause my pc hasnt got a DHCP server so i changed that to Static IP command.  all other sides are still same with library example. when i monitorized the status at serial port. I can see the all links completed with suscess and "the webserver is accessible @ 10.0.0.5"(my board ıp which i initialized at lwIPinit func) i try to access to server with browser ie, crome etc . but  i cant access. there is nothing to connect . i monitorized network there is no frame or package from my board ıp adress to anywhere. my ethernet switch @board is on status. my cable is cross.( i tried with normal one-to one  cable but still nothing) my firewall is offline. my antivirus is disabled. i tried some different codes(udp examples etc) but still nothing. the ethernet symbol is always spinning. i have no idea why i cant do it. if you have and experience with this library and if you have an any idea pls help me :)  sorry for my weak english and thx for helping