imagecreate()

On MS Win 98 / Apache / PHP 4 If somebody out there using Win can check my php.ini file and advise me what I'm doing wrong. I have uncommented: .............. extension=php_gd.dll .................. and have included: .................. extension_dir = C:\php4\extensions .................... I run the php script: <? header("Content-type:image/png"); $image=imagecreate(200,200); imagepng($image); ?> .................... I receive: X-Powered-By: PHP/4.0.0 Content-type:image/png Fatal error: Call to undefined function: imagecreate() in c:\program files\apache group\apache\htdocs\image.php on line 3 Thank you. TR ........................................... // this is in my php.ini file: ;;;;;;;;;;;;;;;;;;;;;;;;; ; Paths and Directories ; ;;;;;;;;;;;;;;;;;;;;;;;;; include_path = ; UNIX: "/path1:/path2" Windows: "\path1;\path2" doc_root = ; the root of the php pages, used only if nonempty user_dir = ; the directory under which php opens the script using /~username, used only if nonempty ;upload_tmp_dir = ; temporary directory for HTTP uploaded files (will use system default if not specified) upload_max_filesize = 2097152 ; 2 Meg default limit on file uploads extension_dir = C:\php4\extensions ; directory in which the loadable extensions (modules) reside ;;;;;;;;;;;;;;;;;;;;;; ; Dynamic Extensions ; ;;;;;;;;;;;;;;;;;;;;;; ; if you wish to have an extension loaded automaticly, use the ; following syntax: extension=modulename.extension ; for example, on windows, ; extension=msql.dll ; or under UNIX, ; extension=msql.so ; Note that it should be the name of the module only, no directory information ; needs to go here. Specify the location of the extension with the extension_dir directive above. ;Windows Extensions ;extension=php_mysql.dll ;extension=php_nsmail.dll ;extension=php_calendar.dll ;extension=php_dbase.dll ;extension=php_filepro.dll extension=php_gd.dll ;extension=php_dbm.dll ;extension=php_mssql.dll ;extension=php_zlib.dll ;extension=php_filepro.dll ;extension=php_imap4r2.dll ;extension=php_ldap.dll ;extension=php_crypt.dll ;extension=php_msql2.dll ;extension=php_odbc.dll .................................... //this is the php script: <? header("Content-type:image/png"); $image=imagecreate(200,200); imagepng($image); ?> ............................... //this is what I get: X-Powered-By: PHP/4.0.0 Content-type:image/png Fatal error: Call to undefined function: imagecreate() in c:\program files\apache group\apache\htdocs\image.php on line 3