All you have to do is uncomment before mbstring.dll or so
I doubt that your ini will make any difference, probably best to contact the hosts again.
This code snippet is for windows but it's more or less the same for linux
extension=php_mbstring.dll
;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_iconv.dll
;extension=php_ifx.dll
;extension=php_iisfunc.dll