请问F28M35无法下载到flash运行如何解决

在用F28M35H52C1开发板做M3实验时，程序能在RAM中运行，但无法下载到flash，CCS5.4提示：
Cortex_M3_0: Loader: One or more sections of your program falls into a memory region that is not writable.  These regions will not actually be written to the target.  Check your linker configuration and/or memory map.
在flash编译时候所用的cmd文件是TI controlSUITE下device_supportf28m35xv203MWarecmdF28M35x_generic_M3_FLASH.cmd，用device_supportf28m35xv203MWarecmdF28M35H52C1_m3.cmd也是相同情况。
请问如何解决这一问题？