Your probably not from the U.S. or you would not be asking about Neteller. Anyway if you are from the U.S. neteller is DEAD there.
So, you won a freeroll and want to withdraw. Probably not going to happen any time soon. All poker sites
are a little different, and I am not familiar with Poker4Ever, but I bet you have to clear a "certain amount of points" or raked hands or something like that before you can withdraw.
Now, until you make a "Deposit" FROM neteller, You can not withdraw TO Neteller on almost every site.
Here is what I did 2 years ago: I won a bunch of money on 2 different Poker sites, It was from freerolls
and No Deposit bonuses, so I never Deposited. Well I couldn't withdraw until i Cleared a certain amount of "Points". So I played a Ton of Sit-n-go's and a LOT of ring games. After about a month I was able to Withdraw, but only by Check (Mail). So when I received the funds I opened up a bank account at a different bank(Other than my personal finances) and I linked that right to neteller. Then I could deposit and receive bonuses and withdraw back to Neteller whenever I cleared a bonus. Then when another bonus opportunity came up. I'd move money into Neteller and back to a Pokersite to get the bonus (Opportunity)
Hope this helps