cannot insert product

hi...my opencart version is 1.5.4 currently i cannot insert product after insert just nothing load the url same like

http://handphonemalaysia.com/admin/inde ... e0ed40f79e

this is log files i testing insert product

2014-03-06 10:35:06 - PHP Notice: Error: Unknown column 'custom_title' in 'field list'<br />Error No: 1054<br />INSERT INTO oc_product_description SET product_id = '120', language_id = '1', name = 'testing testing', meta_keyword = '', custom_alt = '', custom_h1 = '', custom_title = 'sssss', meta_description = '', description = '<p>\r\n dsssssssssss</p>\r\n', tag = '' in /home/handphon/public_html/system/database/mysql.php on line 49

any solution help with many appreciate ....!!

It can't find the field `custom_title`