[SMBX] USING WARPS TO MOVE TO OTHER MAPS

I've got a Door style warp.

I'm laying down an Entrance. Locked, Yes.

In the Warp To Level box I put in "Level 2". I also tried "Level 2.lvl". The exact spelling of the file.

In the box below that I've tried Normal Starting point and Warp 1. Creating a warp spot in Level 2.

No matter what I do it keeps warping to the very beginning of the game. Can anybody tell me why?