Package Fixed property

Hey everyone! 

I have a problem with keeping fixed property FIXED. There is a .dra file of 5141.48A package, which contains traces and vias. The thing is, when I add a Fixed property to those elements, it is ignored in pcb project, and so, when the autoroute function is used, for example, it can automaticly remove traces and vias I need to keep.

For now I Fix those traces inside PCB project, which is dumb and time-consuming, couse there is a lot of those package. 

I use Cadence PCB Designer 17.2.

Any help will be appreciated, thx.