Print overlays from iSeries

I am trying to create an overlay on the iSeries.  I followed the instructions in Bill Cressy’s
article about 10 steps  to creating
overlays on the AS/400.  I got the printer
driver created. Created the source
file. FTP’d the source to
QDLS/overlays. Did the cpyfrmpcd into a
source file. But when I do the crtovl
cmd, it comes back with invalid source. I think I missed something. Any
help is appreciated.