[Asterisk-Users] ignorepat doesn't work

[BK [address only for mailing lists]]

Hi

in order to keep the dial tone after pressing 9 for 'outside line' I 
have this in my extensions.conf

[localpstn]
ignorepat => 9
exten => _9[123456789]XXXXXXX,1,Dial,${PSTN}/${EXTEN:1}
exten => _9[123456789]XXXXXXX,2,Congestion

this is properly included in the handsets' context but the dial tone 
disappears after pressing 9.

am I missing something?

thanks in advance
regards
bk