If you run 04 that could be why? i do not test for 04 and havnt since 07. If your running 06 then you are missing a kuid if your not seeing the loco. Use cmp to find the missing kuids and you should be fine.
CMP can let you know what your missing. No one else can tell you what you have on your computer other than you. The 2 most common reasons why something that you download don't show in game is a missing dependency and the wrong build number.