imap_set_quota() function

Hello, I'm trying to use PHP's imap_set_quota() function to manage user's quotas. I can set user's quota to 0 with: imap_set_quota($mbox, "user/afif", none); or imap_set_quota($mbox, "user/afif", 0); And for sure I can set user's quota to any other value > 0 But when I'm trying to delete quota (set unlimited quota) for the user with imap_set_quota($mbox, "user/afif", -1); imap_errors() gives me this error: "IMAP protocol error: Invalid quota list in Setquota" I have compiled PHP with c-client 2001 FINAL as suggested at php.net site. But it still doesn't work :-) My configuration is: name : Cyrus IMAPD version : v2.2.1-BETA 2003/07/16 21:18:54 os : FreeBSD os-version : 4.7-RELEASE environment: Built w/Cyrus SASL 2.1.13 Running w/Cyrus SASL 2.1.15 Sleepycat Software: Berkeley DB 3.3.11: (July 12, 2001) Built w/OpenSSL 0.9.6h 5 Dec 2002 Running w/OpenSSL 0.9.6h 5 Dec 2002 CMU Sieve 2.2 PHP-4.3.3 Apache/1.3.27 c-client 2001 FINAL Have anyone had any issues or luck doing the same thing? May be I missed something? Any help would be greatly appreciated! Dmitry