php_mysql.dll ne more naložit

do danes je vse delalo, danes pa sem naložu navicat premium soft ker sem hotu nekaj z njim naredit pa se je nekaj zataknilo in ne vem kaj. Problem je ker vedno govori da ne najde php_mysql.dll ampak exstension_dir je lepo nastavljen in ne vem kej bi bil lahko problem. Navicat sem dal dol se enkrat zrihtal php in mysql pa ista napaka ves cas?

extension_dir = C:\HTTPSERVER\php-5.0.5-Win32\ext
;extension=php_bz2.dll
;extension=php_cpdf.dll
;extension=php_curl.dll
extension=php_dba.dll
extension=php_dbase.dll
;extension=php_dbx.dll
;extension=php_exif.dll
;extension=php_fdf.dll
;extension=php_filepro.dll
extension=php_gd2.dll
extension=php_gettext.dll
;extension=php_ifx.dll
;extension=php_iisfunc.dll
extension=php_imap.dll
;extension=php_interbase.dll
;extension=php_java.dll
extension=php_ldap.dll
extension=php_mbstring.dll
;extension=php_mcrypt.dll
;extension=php_mhash.dll
;extension=php_mime_magic.dll
extension=php_ming.dll
;extension=php_mssql.dll
;extension=php_msql.dll
extension=php_mysql.dll
;extension=php_oci8.dll
extension=php_openssl.dll
;extension=php_oracle.dll
;extension=php_pdf.dll
;extension=php_pgsql.dll
;extension=php_shmop.dll
;extension=php_snmp.dll
;extension=php_sockets.dll
;extension=php_sybase_ct.dll
;extension=php_tidy.dll
;extension=php_w32api.dll
;extension=php_xmlrpc.dll
;extension=php_xsl.dll
;extension=php_yaz.dll
;extension=php_zip.dll

kaj bi lahko bilo narobe