You might have the same trouble as me:
http://permalink.gmane.org/gmane.comp.gis.openstreetmap.tilesathome/2501
what I did is comment the line 97 in tahconfig.pm:
#if($pw =~ /\W/){
# die("Check your upload password\n");
#}
It works fine for me, but there must be a good reason for the password to be
limited like that ;)
Pierre