having problem in using the API function in keil v 4.7

Hi

I am using Keil v4.7 compiler..i vill try to use API function for tm4c123gh6pm but i am getting a problem,can any one tell how to use those function in keil compiler,i included drive lib,startup files but still i am getting this error

2ndblink.c(27): error:  #5: cannot open source input file "inc/hw_types.h": No such file or directory

but example project in ti/tivaware/examples/boards/project0 is compiling without error

please help me to resolve this problem