Anyway, the connectivity issue im not sure what is the cause, as it was working fine earlier.
I dont have any firewall or anything that could be the cause.
Don't know then, maybe reboot, check antivirus or other stuff that might be blocking it.
I believe its now GPU mineable now?
CPU is profitable if your electricity rates are low to moderate and you have a CPU with AES-NI. It is GPU mineable too, but efficiency between CPU and GPU is close to the same. GPU is more scalable since you can buy more cards.
EDIT: noted AES-NI as a requirement for CPU mining to be efficient. Core 2 Quad is too old. It can mine, but not very efficiently.