problem in implementation of examples of Dr Rulph Chassaing book on DSKc6713

Hello every one.I have bought a book by Dr Rulph Chassaing on DSK
c6713 which is accompanied by a CD containing all the source codes of
the BOOK examples and support files.
Now i am trying to implement the first two examples of the book on my
DSK.
I have followed all the instructions in the book.Included all the
files and libraries as told and all the settings are according to the
instructions. Now when i try to build the file three object files are
created which which are
c6713dskinit.obj
sine8_LED.obj
Vectors_poll.obj

and after that there are 4 errors which are

symbol_DSK6713_AIC23_codeccontrol is defined multiple times in
c6713dskinit.obj and sine8_LED.obj

symbol_DSK6713_AIC23_codecdata is defined multiple times in
c6713dskinit.obj and sine8_LED.obj

symbol_DSK6713_AIC23_codeccontrol is defined multiple times in
c6713dskinit.obj and dsk6713_aic23_opencodec.obj

symbol_DSK6713_AIC23_codecdata is defined multiple times in
c6713dskinit.obj and dsk6713_aic23_opencodec.obj

since i am a beginner in this field so i am unable to understand what
is happening and struck here. If any one knows the solution of this
problem kindly tell me as soon as possible since i have to implement
my project on this board. Waiting for reply from any one. Start a New Thread