小弟我做了一个壁纸的应用程序，就是把应用程序里面的图片保存到本地文件夹里面。小弟我写完后再模拟器下运行正常，但是把它移植到真机下就保存失败？这是为什么

我做了一个壁纸的应用程序，就是把应用程序里面的图片保存到本地文件夹里面。我写完后再模拟器上运行正常，但是把它移植到真机上就保存失败？这是为什么？

void SetName(belle *pMe){

    char time[50];

        char temGroup[10];

    char temGroup1[10];

    char temGroup2[10];

    char temGroup3[10];

    char temGroup4[10];

    char temGroup5[10];

            JulianType rJulianDate;

        GETJULIANDATE(0, &rJulianDate);

        DBGPRINTF("wYear=%d,wMonth=%d,wDay=%d,wHour=%d,wMinute=%d,wSecond=%d\n",rJulianDate.wYear,rJulianDate.wMonth,rJulianDate.wDay,rJulianDate.wHour,rJulianDate.wMinute,rJulianDate.wSecond);

        SPRINTF((char*)temGroup, "%d", rJulianDate.wYear);

        SPRINTF((char*)temGroup1, "%d", rJulianDate.wMonth);

        SPRINTF((char*)temGroup2, "%d", rJulianDate.wDay);

                SPRINTF((char*)temGroup3, "%d", rJulianDate.wHour);

        SPRINTF((char*)temGroup4, "%d", rJulianDate.wMinute);

        SPRINTF((char*)temGroup5, "%d", rJulianDate.wSecond);

        DBGPRINTF("%s-%s-%s-%s:%s:%s",temGroup,temGroup1,temGroup2,temGroup3,temGroup4,temGroup5);

                MEMSET(time,0,sizeof(time));

        STRCAT((char*)time,temGroup);

        STRCAT((char*)time,temGroup1);

        STRCAT((char*)time,temGroup2);

        STRCAT((char*)time,temGroup3);

        STRCAT((char*)time,temGroup4);

        STRCAT((char*)time,temGroup5);

        DBGPRINTF("=================%s",time);

                MEMSET(pMe->savefilename,0,sizeof(pMe->savefilename));


STRCAT(pMe->savefilename,"fs:/mod/10888/");

STRCAT(pMe->savefilename,time);

STRCAT(pMe->savefilename,".jpg");

}


void ReadFile(belle *pMe,const char *myfile,const char *savefile)

{    

    int count;

    AEEFileInfo   pInfo;

    AECHAR sh[20] ={'l','i','n','g'}; 

    AECHAR ss[20] ={'s','s','s','s'}; 

        pMe->pMyFile = IFILEMGR_OpenFile(pMe->pMyFileMgr,myfile,_OFM_READ);

    

    if(pMe->pMyFile==NULL){    

        DBGPRINTF("ENTER pMe->pMyFile11 = NULL\n");

        return;    

    }

    

    IFILE_GetInfo(pMe->pMyFile,&pInfo);//读取文件大小

    DBGPRINTF("pMe->pInfo->dwSize=%d\n",pInfo.dwSize);

    

    pMe->mydata=(char *)MALLOC(pInfo.dwSize);//分配动态内存