For the DCC issue, I had the same problem.
1) Go to View < Options < Local Info.
2)Make sure that you have local host checked.
3)And also that the look up method is from the server.
I had this problem, because I specify an IP Address for my LAN. Therefore you're trying to send from your computer IP and not your ISP IP, which you cannot do. This should fix the problem.
-arkt1k
