Solution : https://service.sap.com/sap/support/notes/577504 (SAP Service marketplace login required)
Key words : 
terms sap internet sales, internet pricing, shopping basket, configurable items, ipc reason, support package 14, prerequisites, configurator, note 486061
Related Notes : 
       
| 530835 | IPC Support Packages for CRM 3.0, CRM 3.1 and CRM 4.0 | 
| 486061 | How to get patches for CRM Internet Pricing Configurator |