Network Component recv() locked when Net4_CM3_L.lib(net_eth.o) compiled to off-chip RAM

Hi guys,

I am facing this problem for a long time and different versions of Keil.

When net_eth.o is in off-chip RW_RAM1 (beginning at 0x60000000) networking does not work properly. (STM32F4xx, Network Component 7.12) Simplified Problem:

Thread 1:

netInitialize();
osThreadNew(ts_net_thread);
socket();
ioctlsocket(set non-blocking);
connect();
set socket connecting

while(1){
    osEventFlagsWait(.....);
    if( received ){
        PrintData();
    }

}

Thread 2 - ts_net_thread:

while(1){
    osEventFlagsWait(any, 1500ms);
    if(socket is connecting){
        int ret = connect(sckId, .... );
        if( ret == BSD_ISCONN)
            socket = connected;
    }
    if(socket is connected){
      int ret = recv(scktId, .... );
      if( ret < 0)
        print("0x%X"); 
      else
        osEventFlagsSet(datarecvd)
    }
}

When the code is compiled and eth is in RW_IRAM1 recv does not return BSD_ELOCKED but when eth is in RW_RAM1 problem appear and recv() returns BSD_LOCKED.

Earlier I find that there should be a problem with ETH driver and DMA. Does anybody have a hint to this problem?