include in the same directory

[Anon]

I am having trouble with include statements. If I include a file with a full virtual path, it works fine (such as these):

include("./xyz.inc");
include("../scripts/xyz.inc");

but, the following fails:

include("xyz.inc");

without the ./ in front of the path, even when the file to be included is in the same directory. Any ideas?

Thanks,
Scott