Help!! Not sure what's wrong but i keep getting the message>This file does not appear to be in the correct IMS format:2, every time i try to preview a page.

Does the file you are trying to open have a .ims file extension? Trying to open a .html page for example will cause that problem.

Another possibility is that your .ims project file is corrupt. How does a known good project perform -- for example the project under Help > Tutorials?