Brew通过IWeb连接网络并下载文件，模拟器测试成功但手机测试死机，什么原因呢？帮忙看看代码哪里有有关问题

Brew通过IWeb连接网络并下载文件，模拟器测试成功但手机测试死机，什么原因呢？帮忙看看代码哪里有问题。
通过IWeb连接网络并下载一个图片文件，模拟器上测试成功，但在手机上测试引起死机，高手帮忙看看是什么问题。代码大概如下：

typedef struct _downloadfile {
AEEApplet a;
IFileMgr * m_pFileMgr;
IWeb * m_pIWeb;
ISource * m_pISource;
IImageCtl * m_pIImage;
AEECallback m_cbgps;
AEECallback m_cbimg;

AEECallback cb;
IWebResp * piWResp;

}downloadfile;



static void imgCallback(void * p)
{
int bytesRead;
char x[1000];
IImage* pSplash = NULL;
AEEImageInfo rImageInfo;
CtlAddItem ci;
AEERect rc; 
downloadfile * pApp = (downloadfile *)p;

bytesRead = ISOURCE_Read(pApp->m_pISource, x, 1000);

while (bytesRead != ISOURCE_END && bytesRead != ISOURCE_ERROR) {

if (bytesRead != ISOURCE_WAIT)
IFILE_Write(file, x, bytesRead);
else {  
ISOURCE_Readable(pApp->m_pISource, &pApp->m_cbimg);
return;
}

bytesRead = ISOURCE_Read(pApp->m_pISource, x, 1000);

}

IFILE_Release(file);

if(bytesRead != ISOURCE_ERROR)
{
if( (pSplash = ISHELL_LoadImage(pApp->a.m_pIShell,"map.png") ) != NULL)
{  
IIMAGE_GetInfo(pSplash, &rImageInfo);
IDISPLAY_ClearScreen(pApp->a.m_pIDisplay);  

MEMSET(&ci,0,sizeof(ci));
ci.pImage = pSplash;
rc.x = 0;
rc.y = 0;
rc.dx = 96;
rc.dy = 113;

IIMAGECTL_SetProperties(pApp->m_pIImage,CP_BORDER);
IIMAGECTL_SetRect(pApp->m_pIImage, &rc);
IIMAGECTL_SetImage(pApp->m_pIImage,pSplash);
IIMAGECTL_SetActive(pApp->m_pIImage,TRUE);
IIMAGECTL_Redraw(pApp->m_pIImage);

IIMAGE_Release(pSplash);  
IDISPLAY_Update(pApp->a.m_pIDisplay);

return;
}
}

}

static void WebAction_GotResp(void *p)
{
downloadfile *pMe = (downloadfile *)p;
WebRespInfo *pwri;

pwri = IWEBRESP_GetInfo(pMe->piWResp);  

pMe->m_pISource = pwri->pisMessage;

IFILEMGR_Remove(pMe->m_pFileMgr, "map.png");
file = IFILEMGR_OpenFile(pMe->m_pFileMgr, "map.png", _OFM_CREATE);


CALLBACK_Init(&pMe->m_cbimg,imgCallback,pMe);
ISOURCE_Readable(pMe->m_pISource, &pMe->m_cbimg);  
}

static void WebAction_Start(downloadfile *pMe)
{

CALLBACK_Init(&pMe->cb, WebAction_GotResp, pMe);  

IWEB_GetResponse(pMe->m_pIWeb,
(pMe->m_pIWeb, &pMe->piWResp, &pMe->cb, "http://image163.poco.cn/mypoco/myphoto/20100625/16/5548589320100625161506097.png",
WEBOPT_HANDLERDATA, pMe, 
WEBOPT_METHOD, "GET ",
WEBOPT_END));
}

/*static void imgCallback(void * p)函数里定义了一个char x[1000]，不清楚是否这个引起系统崩溃。在电脑的模拟器上，char x[1000]比char x[100]下载的速度快。这里要怎么定义才正确？
是否有朋友写过下载文件的简单代码？可否发上来借鉴一下？*/

------解决方案--------------------------------------------------------
到手机测试时，IP地址要用内网地址。