2004 Scenery Read Error Message . Please Help

When i load a flight plan and click fly now and its loading scenery it says " Scenery Read Error; Noexistent directory retry or ok. I installed it the same day and running everything from the hard drive and its in the default FS9 folder. Please help. Not to mention when i take off and see scenery from the air its like blocks of brown and green terrain absolutly no detail or mesh just like brown for dirt and mountains and green for the grass the same way when you have a slow machine and it loads detail slowly and at the distance you see blank scenery. Thats what i see I can only see the airports.Video card is working great with other software am I missing something here?Also:Have not installed no scenery files to flight sim . Im running Win98. I installed FSFS on my D:/ partition which is where all my program files are at. Also I will be flying and next thing you know FS 2004 dissapears it closes itself without warning or error.