Clean Site still in blacklist

This site uses the fastdown.com.ar for cdn
https://www.virustotal.com/en/url/78c477936b36182650aeaa01672ab3ab7fda31786fc6f8e362b0a0ce833c87f7/analysis/1394798205/

fastdown.com.ar seems to be blacklisted but its also clean:

https://www.virustotal.com/en/url/1636051afa3bcbaab8efdf5f66eb4cea4b42a3c8704f4babbd076821c2c01152/analysis/1394798478/

Is there a way to remove it from the blacklist?

http://zulu.zscaler.com/submission/show/981f664b3570c71e769ae512f068249b-1394798619
http://168.144.32.45/blacklist/bl/99.225.243.0/

If the site really is clean you can ask avast to allow it:
http://www.avast.com/contact-form.php

IP (54.207.19.46) is blacklisted here bl.spamcannibal.org http://whatismyipaddress.com/blacklist-check

I did it, 2 times before and I got no answers.

Avast is the only av that got that false positive.

That is because avast has something that other av’s don’t.
A blacklist check.

If you have requested to allow the site, you just have be patience.
avast will look at it and if it really is clean they will allow it.