It means: you deposited to your mql5 forum account without reading the rules how to withdraw?Why? Are you sending your money to everywhere without reading the rules how to get the money back?You have a lot of money ...[joking]
MQL5.community Payment System - the article
Warning: there is a set of conditions which might prevent withdrawal.
MQL5.community users can deposit to their accounts in several different ways. However, withdrawal is possible for quite a few of them! In addition, the fraud protection system does not allow to transfer funds from one payment system to another using the MQL5.community website as an intermediary.
MQL5 is not some kind of trading account you deposit money to for trading, it's used for all services offered here. Maybe you should read before depositing next time ;)
There is a system here. Its not this big by chance