help dh_make + debuild (with orig source code) !

[Ste Pelux <pelux@tiscalinet.it>]

I get with every package an error compiling with debuild a debianazied 
regular source package converted with dh_make
in fact (this is mplayer 0.11pre24) debuild says:


dh_installdirs
# Add here commands to install the package into debian/mplayer.
make install prefix=/tmp/mplayer-0.11/debian/mplayer/usr
make[1]: Entering directory `/tmp/mplayer-0.11'
strip mplayer
cp mplayer /tmp/mplayer-0.11/debian/mplayer/usr/bin
install -m 644 DOCS/mplayer.1 
/tmp/mplayer-0.11/debian/mplayer/usr/man/man1/mplayer.1
install: cannot create regular file 
`/tmp/mplayer-0.11/debian/mplayer/usr/man/man1/mplayer.1': No such file or 
directory
make[1]: *** [install] Error 1
make[1]: Leaving directory `/tmp/mplayer-0.11'
make: *** [install] Error 2
debian:/tmp/mplayer-0.11# 


it happends also with other packages!!! 
how could i fix this?

P.S. could u also xplain to me what is the difference between dh_make and 
deb-make?
thanks

Stefano