pool wont connect on 4444 but will on 3333 is it possible for you to try 512 . 256 may be out of the range of your software
Port 4444 was blocked for some reason. Changed it to port 5555 and verified that it is open from the outside, so static difficulty of 256 should work now.
oh snap it works perfect
just a thought depending on what your using
4444 may be reserved for x11