it seems, that the path and file is available, but only for a logged in wordpress user. The plugin doesn´t use wordpress user rights but needs direct access to this path. You can try this by logging out (from every instance of your Firefox) and try to access to the path again. You will see, there is no access without logging into wordpress. So please try to use a path which is available for all users.
I use your plugin to download files from a project. The folder is writable the file is a pdf file and is in the folder yet I receive this error:
Filedownload Error: file ‘http://agents.condosinvestment.com/wp-content/uploads/price-list/amazon-building2-price-list.pdf’ does not exist!
Yet path is correct.,because when I simply copy the path into the browser window the pdf loads into Firefox.
I thought I inform you of this. I use latest version of Worpress and the twentyeleven theme.
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