Vault 2i analog input / output

When selecting the analog input on the Vault 2i , the volume on the pulseflex 2i is mutch lower than when I select a station or listen to a playlist ..

The analog input on the Vault is connected to the analog output from my pre-amp ( Rotel )

Is this signal to weak ? When I use the earphone output a have the same problem .

Is ther a solution ? Perhaps a setting ?