imap-c-client installed, but not working as expected, undefined functions, imap login fails, pop3 is ok, bug?

hello to all, i have some trouble using imap functions with php. php 4.3.6 has been compiled with --with-imap=/usr/local and the imap-c-client2004rc9 include files rfc822.h/mail.h/linkage.h where copied to /usr/local/include phpinfo() tells me it has in version 4.1 also. also courier-imap works fine. now i tried to write a tool to get all accounts from database and login via imap to list the quotas. my script looks like: $MAILSRV="MYIP:143/imap"; $mbox = imap_open ("{".$MAILSRV."}INBOX", "user", "pass") or die("can't connect: " . imap_last_error()); ...this is what i use to connect my imapserver, MYIP=xxx.xxx.xxx.xxx, oficial ip with ptr but connection fails and server says: * Warning*: imap_open(): Couldn't open stream {217.175.253.115:143/imap}INBOX in */home/WWW/m000000/share/html/.testflug.de/imapquota.php* on line *3* can't connect: Can not authenticate to IMAP server: Authentication failed. but user and pass is the same as for pop3, and if i use pop3 login: $MAILSRV="MYIP:110/pop3"; then connecting the server goes well! my imap server is courier 3.0.3 (but also on 1.4x and 2.x this script fails) mail-log says: ==> /home/LOGS/MAIL/maillog <== tomcat imapd: Connection, ip=[::ffff:MYIP] tomcat imapd: LOGOUT, ip=[::ffff:MYIP] -- not wondering why login fails..... there was NO login into imap... no username given -- normally logfile looks like: ==> /home/LOGS/MAIL/maillog <== tomcat imaod: Connection, ip=[::ffff:217.175.253.115] tomcat imapd: LOGIN, user=m000000-410, ip=[::ffff:217.175.253.115] tomcat imapd: LOGOUT, user=m000000-410, ip=[::ffff:217.175.253.115], top=0, retr=0 normally there is also a LOGIN before LOGOUT, also the username is missing.... ok, i use pop3, and hope imap functions can work on it ;) dont know..... i try to get quota from server: ... $quota = imap_get_quotaroot($mbox, "INBOX"); or $quota = imap_get_quota($mbox, "INBOX"); .... and php tells me: *Fatal error*: Call to undefined function: imap_get_quotaroot() but why? php.net says: This function is currently only available to users of the c-client2000 or greater library. and i have installed he library and compiled static into php, php static into apache, everythings working very well, except my own imap scripts ;) it seems that some of the functions may not be implemented anymore or not yet? maybe i did something wrong.... thanks in advance for any kind of help and hints, tips :) a bug in php? yours sincerely volker