Cannot move mailboxes between Exchange 2013 Databases. I also can move mailboxes from my exchange 2010 Database to the Exchange 2013 server

I Cannot move any mailboxes between Databases or between the exchange 2010 and exchange 2013 server. 

All the System Mailboes are on the old exchange server. I tried
Get-Mailbox -Arbitration | New-Moverequest -Targetdatabase "Exchange2013MBDB"

But the mailboxes just sits in Queued status