is this safe to mine again? seeing its back up on yiimp pool
I would say no. I have been mining on the yiimp pool for over an hour and have 0 confirmed blocks.
You need to wait until you have 140 confirmations; which you don't have yet-- that's why you haven't been paid.
It has usually been pretty fast in the past. That's why I assumed it wasn't good yet. I've looked at the oldest one and it's up to 119 confirmations so I'll know in a little bit if it's good.