sdl_net check_socket mit client

[alterbro]

ich hab grad ein sdl_net client und server erstellt.
über check_socket prüf ich netzaktivität. beim server klappts ganz gut, aber der client läuft nich, was hab ich falsch gemacht

#include <SDL.h>
#include <SDL/SDL_net.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef _WIN32
#undef main
#endif
int main (void)
{ 
	IPaddress address;
	TCPsocket sock_server;
	SDLNet_SocketSet set;

	if(SDL_Init (0) ==-1)
	{
		printf ("SDL_Init: %s\n", SDL_GetError ());
		exit (1);
	}
	if(SDLNet_Init () ==-1)
	{
		printf ("SDLNet_Init: %s\n", SDLNet_GetError ());
		exit(1);
	}
	if (SDLNet_ResolveHost (&address, "213.221.194.72", 10000) == -1)
	{
		printf ("SDLNet_ResolveHost: %s\n", SDLNet_GetError ());
		SDLNet_Quit ();
		exit (1);
	}
	sock_server = SDLNet_TCP_Open (&address);
	if (!sock_server)
	{
		printf ("SDLNet_TCP_Open: %s\n", SDLNet_GetError ());
		SDLNet_Quit ();
		exit (1);
	}
	set = SDLNet_AllocSocketSet (1);if(!set){exit(0);}
	printf ("Init finished. Connected to server. Send Data after 5 Seconds...\n");
	if(SDLNet_TCP_AddSocket (set, sock_server)!=1){exit(0);}
	/*SDL_Delay (5000);
	*/

	char data[128];
	while(true){
		printf("%ics\n",SDLNet_CheckSockets (set, 0));
		if(SDLNet_SocketReady(sock_server)||true){
			SDLNet_TCP_Send (sock_server, "pong\n", 128);
			SDLNet_TCP_Recv (sock_server, &data, 128);
			printf("%s\n",data);
		}
		printf("lol\n");

	}
	SDLNet_TCP_Close (sock_server);
	return 0;
}