CW for ARM: change stack size

I'm using vers. 4.4.1 / Windows 7 / 64bit

Chaning the values in

Project Explorer - Properties - Debug - Runtime Memory Area

does not change the values in my linker script. I'm forced to change them manually; but this should not be the purpose of an IDE.

Although I can create a linker script with mkld.exe, the generated script is not complete and the build process complains undefined sympols __HEAP_SIZE__, __STACKSIZE_PROCESS__ and __STACKSIZE__

If I insert them manually, the build process accomplishs error-free.

Where do I make the mistake? Thanks in advance.