Migrating Public Folders from Exchange 2010 to Exchange 2013

Hi,

I am just finishing migrating from SBS2011 with Exchange 2010 to Server 2012 Standard with Exchange 2013.

The problem I am having is when I run the New-MigrationBatch script on the 2012 server to begin migration of public folders from the SBS2011 Server.

I have followed this https://technet.microsoft.com/en-GB/library/jj150486(v=exchg.150).aspx 

I run this cmdlet New-MigrationBatch -Name PFMigration -SourcePublicFolderDatabase (Get-PublicFolderDatabase -Server sbserver) -CSVData (Get-Content C:\PFMigration\folder-to-mailbox.csv -Encoding Byte) -NotificationEmails

I then get this error 

A parameter cannot be found that matches parameter name 'SourcePublicFolderDatabase'.
    + CategoryInfo          : InvalidArgument: (:) [New-MigrationBatch], ParameterBindingException
    + FullyQualifiedErrorId : NamedParameterNotFound,New-MigrationBatch
    + PSComputerName        : server2.domain.local

I have tried changing this to direct public folder database name but I still get errors.

Can anybody shed any light as to what I am doing wrong here?

Thanks in advance