till now i try to withdraw my earning but it is always pending!! 
It is very clear that HYIP and Ponzi schemes are just SCAMS. I don't know why people keep investing their hard earned money with such programs. I think its somehow an addiction like the gambling addiction.
That's right to say hyip is frank scam but does not mentioned anything that he has invested in hyip. First we need get the clear infornwcabout this issue.
It may be a mining issues like pending transaction in his wallet. For that we need to get the reply from him for above posts and then we can proceed to help him.