hi on trans railroad simulator 2004 i go on the website to download new locos and some work and some dont for example when i download one it shows in the box in the game but you cant selct it to place on to the track or there is no picture but the name of the loco is in the list or the picture is a white box and when you do select it and then selct another it dissapears from the list i have donwloaded locos using the download helper to and it happens ejther way any ideas?