ewin and TCP together

Hi
i'm using :
MDK-ARM standard version 4.20
RL-ARM Real-Time library V4.13
LPC1788
i need to use ewin(segger) and TCP (RL) together .
when i use each of them individually they work fine.
but when i add TCP to ewin, the TCP doesn't work (doesn's answer my ping )
and my TCP driver is Emac_lpc17xx(i ported it for lpc1788)

i set a pin at the end of the "init_ethernet " function and it didn't set .
but when i put it above of " iap_entry (&pb[0], &pb[0]);" it set.

so whats the problem ?
even when i removed "iap_entry (&pb[0], &pb[0]);" because i knew that
dev_175x = __FALSE;

iap_entry (&pb[0], &pb[0]);
if ((pb[1] >> 24) == 0x25) { /* Use software RMII management routines. */ dev_175x = __TRUE; }

init_ethernet executed completely but now ENET_IRQHandler never happened !

so i'm really confused what should i do ?

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