Marketpress Import from CSV

Hello,

1. My main site I have no problem with the errors below. As I can import the sample CSV file with no errors.
2. These errors occur when I make a new site/sub directory.
3. I have uninstalled/installed the MarketPress plugin. I have been using the example excel file and it's causing the errors.
4. I have also deleted and created new sites/sub directories numerous times.
5. I have only 4 other plugins activated and there is no conflict with them. Using Simple Market theme.

6. The following error appears when I have made additional sub directories.

Warning: move_uploaded_file(/marketpress-import.csv) [function.move-uploaded-file]: failed to open stream: Permission denied in /home/xxxxxx/public_html/xxxxxx.com/wp-content/plugins/marketpress/marketpress-includes/marketpress-importers.php on line 244

Warning: move_uploaded_file() [function.move-uploaded-file]: Unable to move '/tmp/phpqZNQ9f' to '/marketpress-import.csv' in /home/xxxxx/public_html/xxxxxxx.com/wp-content/plugins/marketpress/marketpress-includes/marketpress-importers.php on line 244

So if you could tell me what I need to do to fix this problem it would be great.

Thanks,