Well, instead of using a platform that is a "building" type object, try using a spline to make the platform...... there are quite a few on the dls.....
try:
name:: Platform
Catagory:: spline
And if you desire the passenger function of a platform use the AJS invisable stations, you can adgust them to fit any platform height, size, and length...
try:
Name:: AJS
just browse around a little, there are quite a few stations availiabe
good day,