The block on the @cryptex24 account has been removed. Apologies for this unfortunate incident; as Aggroed indicated it's our policy to generally block token transfers to known exchange accounts because in 99% of the cases, exchanges don't know about HE tokens and their customer support is unresponsive when people mistakenly send HE tokens to them.
In this particular case, we were not aware that your exchange deals directly with HE tokens. If we had been, we would not have put the block in place. Sorry again for the misunderstanding and any inconvenience caused.