when i finished a site, i want to package them

i select all the content, marco, datatype, and add the css, js, bin(just the package i installed), media

then i create a new umbraco, install the package, but error

the message is :

Could not upload file
System.Exception: Error unpacking extension... ---> System.IndexOutOfRangeException: Index was outside the bounds of the array. at umbraco.cms.businesslogic.packager.Installer.getFileName(String path, String fileName) at umbraco.cms.businesslogic.packager.Installer.LoadConfig(String tempDir) at umbraco.cms.businesslogic.packager.Installer.Import(String InputFile) --- End of inner exception stack trace --- at umbraco.cms.businesslogic.packager.Installer.Import(String InputFile) at umbraco.presentation.developer.packages.Installer.uploadFile(Object sender, EventArgs e)

what is wrong with it?