Have you verified that they are patched with raw enabled ?
Started by eliavecellio « 1 2 » Feature Requests
Started by eliavecellio « 1 2 » RAW Shooting and Processing
Started by ebonite General Help and Assistance on using CHDK stable releases
Started by mikerussell RAW Shooting and Processing
Started by GrAnd General Help and Assistance on using CHDK stable releases