According to your log, this is on of the fail reasons:
Code:
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You have reached your download limit per 3 days: 50000 MB <br>You can <a href='#' id='tariff-scroll'>Extend your Premium account</a> to reset download limits.
If you still get errors which you think are not related to this, please create another log and this time, only start filefox.cc downloads and not any others.
-psp-