Kompozer XML Parsing Shows Error

I recently installed Ubuntu 7.10 and I wanted to do some web design using Kompozer which is a CSS and HTML editor. It did not open at all. I had downloaded Kompozer 0.77 and installed it successfully. Is it not compatible with Ubuntu 7.10? The error message I got is shown below. Please take a look and help me find a solution.

Image error:
Error message:
XML parsing Error: error in processing external entity reference
Location: chrome://editor/content/EdColorPicker.xul
