crontab ?

[Timo]

hello,

why my crontab not / works like
crontab -e  00 21 * * *  /sbin/ifdown eth0
works fine

But when I try start with file
crontab  Eth0Dwn
starts job, but nothing else happend.

Eth0Dwn
00 21 * * *  /sbin/ifdown eth0

TT