[SOLVED] extension install error... please help

WHat would cause this error... Joomla 1.5.. I tried to install the
mod_yj_ns1_15.02

The sportline template installed great.. But then I tried my 1st extension..


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.


Warning: array_merge() [function.array-merge]: Argument #1 is not an array in D:\Hosting\5220776\html\joomla\libraries\joomla\in staller\helper.php on line 142

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in D:\Hosting\5220776\html\joomla\libraries\joomla\in staller\helper.php on line 142

Warning: Invalid argument supplied for foreach() in D:\Hosting\5220776\html\joomla\libraries\joomla\in staller\helper.php on line 187