Problem with IMAP extensions

 Hello everybody, I have a problem running IMAP functions. This is the error iam getting when i try to create a mailbox.I am using php 4.3.9 on windows with pws server. Fatal error: Call to undefined function: imap_open() in C:\Inetpub\wwwroot\mailbx.php on line 2 I have the extensions in proper folder and the dir is also set in php.ini.To create a mailbox do i have to be connected to the net?(is it necessary?). But i tried both as i have net connection at home. when i checked some instructions, i found that activescript.php4dll is missing in the binary distribution for windows. Will that affect the IMAP function from running? where can i get this dll as it was not available in php site (in Binary distribution for php4 thid dll is missing).and if u have any example as how to create a mailbox and receive mail please send. Help me solving this Thank you