Redshark 2.11 seems to be infected with a Trojan virus. Redshark is not working because your virus protection removed the Redshark.exe from your computer. I've sent the Virus notification into AVG for analysis. Hopefully this issue is resolved soon, because until that Redshark is out of comission.
Here is a link to another thread regarding this:
http://www.pokebeach.com/forums/showthread.php?tid=36103&pid=632850#pid632850