Please, can you help? I have 4 Ballistix 4MB modules of memory installed, and Crucial Scanner shows that only 3 slots are occupied. Other system reports confirm the presence of all 4 modules. I have also tried to search the database on Crucial website to check my previous order to correctly identify the memory in my PC and was unable to do so. I think it was further back than the database would allow. I want to add a two further 4MB modules to my PC to fill the remaining 2 slots or change the entire existing memory for faster modules. Could you please say why Crucial Scanner would fail to identify all 4 installed modules, and 2) Is there a way I can access my previous order so I can establish what I actually purchased? Thanks and kind regards, Roy Kelsey.