problem with installing com_joodb_v1.5b3.zip

I tried installing the component and it didn't install. Instead it gave me this error message:

• JFolder::files: Path does not point to a valid folder or the folder has been deleted.
• JFolder::folder: Path does not point to a valid folder or the folder has been deleted.
• JFolder::files: Path does not point to a valid folder or the folder has been deleted.
• Error! Could not find a Joomla! XML setup file in the package.

What do I do? Or what could be the problem?

Hello joomla15,
This is a download issue. Had the same problem.
The size of the com_joodb_v1.5.zip must be 340 kB.
Check if it is this size. Otherwise download it again.
With me it worked perfectly.
Wonderfull plugin!