http://scn.sap.com/thread/3235153
Hello Shahin,
As suggested by Kapil, Please check for authorization error. You can also view SU53 immediately after you enter into Planning book.
C_APO_FUN is the authorization object which has two key functions C_SELECTION and C_SELORG. User of C_SELECTION is - If user is not assigned C_SELECTION function then selection icon does not appear in Planning Book.
Also please read this SCN thread which will be useful -
Hope this will help.
Thank you
Satish Waghmare