Migrating Public Folders from Exchange 2010 to 2013

Hi

Ive run all scripts to get the csv files and after creating the public folder mailbox on exchange 2013 with the command:

New-Mailbox -PublicFolder MailboxName -HoldForMigration:$true

Then when running the command for starting the migration:

New-PublicFolderMigrationRequest -SourceDatabase (Get-PublicFolderDatabase -Server <Source server name>) -CSVData (Get-Content <Folder to mailbox map path> -Encoding Byte)

i get the following error:

Couldn't connect to the source mailbox.
    + CategoryInfo          : NotSpecified: (:) [New-PublicFolderMigrationRequest], RemoteTransientException
    + FullyQualifiedErrorId : [Server=ServerName,RequestId=76d6f674-c4d9-4c67-b0ff-bc16385551dd,TimeStamp=2015-02-24
    01:13:18] [FailureCategory=Cmdlet-RemoteTransientException] 69ADCDAD,Microsoft.Exchange.Management.RecipientTasks
  .NewPublicFolderMigrationRequest
    + PSComputerName        : fasad-mail01.fasadglas.sto

Ive search for the error code "RemoteTransientException" and all i get is that the mailbox should be corrupted and i have to remove it from the quarantine via regedit, but the quarantine is empty

thanks for your help

regards

Carlos