I tried nodes from bidji29 but it still doesn't work.
I also think about DNS, however I've got Primecoin gt installed and it works perfectly fine.
Can you be more precise?
Primecoin-qt works because it is using their OWN DNS seed server! Your no connection may be because you are trying to connect to primecoin-qt!
Btw, my datacoin-qt runs fine on my current computer but don't have connection when I try to run it on a new computer.