NEC missing objects

Hi, I just bought MTS 2013 (Steam online basic version) couple of days ago. All the sceneries inside the NortEast Corridor are missing objects and do not load. Shouldn't they be default sceneries in this package or am I missing something...
The error message shows a list of missing files as I report here (didn't find any file attachment feature)
Consist builder - Can't load rail vehicle - Tank Car v4
Consist builder - Can't load rail vehicle - Tank Car Def2
Consist builder - Can't load rail vehicle - Tank Car v3
and so on......
I wrote to Steam to find out if there could have been some problem with my MTS installation and asked them how to perform a clean install from scratch but I got no answer.
Any help will be appreciated.
Alby
The error message shows a list of missing files as I report here (didn't find any file attachment feature)
Consist builder - Can't load rail vehicle - Tank Car v4
Consist builder - Can't load rail vehicle - Tank Car Def2
Consist builder - Can't load rail vehicle - Tank Car v3
and so on......
I wrote to Steam to find out if there could have been some problem with my MTS installation and asked them how to perform a clean install from scratch but I got no answer.
Any help will be appreciated.
Alby