Solution : https://service.sap.com/sap/support/notes/710013 (SAP Service marketplace login required)
Key words : 
shop management authorization check, downward compatibility reasons, function module bapi_user_get_detail, authority check means, check 'expert mode', terms shop management, j2ee authorization means, current su01 user, su01 login scenario, su05 login scenario
Related Notes : 
       
| 969660 | 6.20/6.40 Patch Collection Installation : Unix | 
| 808869 | Java Components for mySAP ERP 2004 SR1 | 
| 764502 | ISA40: Upgrading ISA and CHM on a SAP Web AS 6.40 | 
| 764433 | ISA40: Upgrading Internet Sales in mySAP ERP | 
| 751504 | ISA40: Upgrading ISA and CHM on a J2EE Engine 6.20 | 
| 743291 | CRM 4.0 SP Stack 6/2004 (SAPKU40006): Release & Info. Note | 
| 731525 | ISAWAC40SP06:Support Package 06 E-selling+Channel Management | 
| 696537 | No authorization check for shop management CRM | 
| 693832 | ISA R/3: Shop management application / security |