New symbol defs..

[Ish Rattan]

I defined two symbols (from user guide) in file mydefs.
Reference to the synbols results in error message shown below.
Any Pointers?

- ishwar

---mydefs--
import @DocumentLayout
def @GreyBox { @Box paint { lightgrey } {} }

import @DocumentLayout
def @HeadingBox left x right y
{ @Box { @CenterDisplay @Heading x y }
}
----error--
lout file "mydefs" (from "mydoc" line 30, from "sample" line 1):
     1,8: import @DocumentLayout not in scope
    2,16: fatal error: exiting now
---