problem on installing csv version

[gtwin]

hi ,

i am currently trying to install horde and imp on my serveur.
but i got this error:
 Fatal error: Call to undefined function: quote() in
/home/imp/horde/lib/Prefs/sql.php on line 250

i have updated PEAR in /usr/local/lib/php/PEAR with the one on the horde.org
site. But it still don t work.
I really d'ont know what to do and where i made a mistake...
i am running php 4.06 on a redhat 6.2 and Apache/1.3.20

Best regards,
Geraud Bourdin
www.3dvf.com