A few questions first:

1 - What edition (Standard, Extra, Commercial, Pro) and version number (v5.xx or v6.xx) do you have? You can get the exact information by opening WED and going to HELP>ABOUT.

2 - What is a "ceil"? Do you mean the ceiling?

3 - Could you post a picture of the problem showing the level in WED and also in the running engine?

Thanks!