error: unable to locate a license for real-time Workshop Embedded coder

Hi, I am using R2007b+ matlab version for my job function. I am using microgen 555 target tool blockset. My model is running well and is build properly. But when I try to compile the model for building the flash file, the following error did pop up. can you please help me to overcome that error...

_ Error using ==>callMakeHook at 120 unable to locate a license for real-Time workshop Embedded Coder. the current target is mpc555rt.tlc _

[Image Analyst]

There is no official Mathworks product called "real-Time workshop Embedded Coder". Please pick your product from the Products drop down list below my comment.