Problem with rel swapping

[Chuy]

For some reason the mario bros stage keep giving me problems when i try swapping it witt any stage
The stage i''m trying to use in it's place is the metal mario stage
Suggestions?

[Segtendo]

What kind of problems?

[Chuy]

*smacks heads* Can't believe i forgot to say that XD
Stage is pitch black with a single collision line that goes through the stage and there's a pow block under the collision

[Chuy]

Not meaning to sound impatient but can anybody think of a fix for this?