If you want the package to keep going then you cannot fail the Task. I looked up the exceptions that can be thrown by the DownloadFile method and you'll likely get a WebException. I would add a second catch block that traps for WebException. If you can recreate the error then capture the error message. If the message is standard then you can check for it in your new catch block, and then retry the download if it was in fact a timeout.

Pseudocode:

Try

Try

Call download file method

Set Task result to Success

Catch WebException

If error message indicates timeout

Call download file method again

Set Task result to Success

Else rethrow error

End Try

Catch

Set Task result to Failed

End Try

Edit: adjust Try indentation