XStandard Lite 2.0 joomla editor-Collection of common programming errors

I am developing a website using joomla 1.5. I am using the editor XStandard Lite 2.0. when I try to edit the articles, i have created earlier or to create a new article, it will save without giving any error message but the whole message is deleted and the message “undefined” is displayed. can any one help me resolve this issue?