[求助] 新人求解关于CCS4.1下导入工程的问题

本人在CCS下导入了一个也是用CCS4写的工程（买开发板人家赠的，应该没问题）编译出现如下问题，真心求教。

D:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake -k all
D:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake: *** No rule to make target `E:/CCS4_works/5509develop_new/GPIO/gpio.cmd', needed by `E://CCS4_works/5509develop_new/GPIO/Debug/5509gpio.out'.
D:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake: *** No rule to make target `E:/CCS4_works/5509develop_new/GPIO/gpio.c', needed by `D:/CCStudio_v3.3/MyProjects/5509/GPIO/Debug/gpio.obj'.
D:\Program Files (x86)\Texas Instruments\ccsv4\utils\gmake\gmake: Target `all' not remade because of errors.
Build complete for project 5509gpio

错误信息是提示缺少文件啊。

小白不懂，求解决方案