Hi tetnet,
Do you have the same issue on demo http://phphtmledit.com/EnableAll.php with your IE 9 browser?
If it works for you, please download the latest version and try again.
Latest version downloads http://cutesoft.net/downloads/folders/54374/download.aspx
If the latest version still get the same issue, please post your test page url, I will check it and get back to you as soon as possible.
Regards,
Ken