Cannot use taginfo file

[Zinger]

hello,
i've tried to use the taginfo file to be alerted by mail when a user creates
a tag.
But it seems that this functionnality doesn't work.

I tried to put into taginfo this line : (PS : This command is also stored
into loginfo and comit. and that's work for these files)
ALL  (echo "To: address@hidden"; echo "Subject: tag created"; echo; cat) |
/usr/lib/sendmail -t

When i try to create a tag, i receive this message :
cvs server: cannot exec (echo: No such file or directory
cvs server: Pre-tag check failed
cvs [server aborted]: correct the above errors first!

Version of CVS :
Client: Concurrent Versions System (CVS) 1.11.1 (client/server)
Server: Concurrent Versions System (CVS) 1.11.1 (client/server)

Thanks for your help.