OMAP-L138 Wince 6.0 BSP Network problem

Hi

I am using the Zoom™ OMAP-L138 Development Kit.(OS: Wince 6.0 R3)

when the network transmission test is carried out continuously , the system is down after a certain period of time.(about 18 minutes)

Test program is PCATTCP.(http://www.ohloh.net/p/ttcpforcompact)

PC:      pcattcp -r

CE:      pcattcp -t -c <ip address>

please,  advise me.

Regards,

ehkim