imap problem

[Anon]

I am using redhat linux 7.1, apache1.20, and php4.0.6
I try to use imap_open() to open a link to my imap server, however there is an error and said that imap_open() is undefined function! why? any wrong with my config? I try to find out the problem in php.ini. I just find that php will load extension=php_imap.dll but there is no extension=php_imap.so or something like that!

[Anon]

U have to add in other files, i am not sure wich ones, its a bit of a pain, search thru the forms and look for help on Imap i know there are some external programs that need to be installed