[ubuntu] error message:casper/initrd.lz: file not found

here is what the code looks like, what should I do.







<?xml version="1.0"?>
<!--
** DO NOT EDIT THIS FILE.
** If you make changes to this file while any VirtualBox related application
** is running, your changes will be overwritten later, without taking effect.
** Use VBoxManage or the VirtualBox Manager GUI to make changes.
-->
<VirtualBox xmlns="http://www.innotek.de/VirtualBox-settings" version="1.12-windows">
<Global>
<ExtraData>
<ExtraDataItem name="GUI/DetailsPageBoxes" value="general,preview,system,display,storage,audi o,network,usb,sharedFolders,description"/>
<ExtraDataItem name="GUI/GroupDefinitions/" value="m=1a13e41e-884c-47a8-bbc3-9a070f1ba955,m=4cb986f3-8b78-49ab-b41b-43a536e8e053"/>
<ExtraDataItem name="GUI/HostScreenSaverDisabled" value="false"/>
<ExtraDataItem name="GUI/Input/AutoCapture" value="true"/>
<ExtraDataItem name="GUI/Input/HostKeyCombination" value="163"/>
<ExtraDataItem name="GUI/LastItemSelected" value="m=LinuxLive"/>
<ExtraDataItem name="GUI/LastWindowPosition" value="443,182,770,550"/>
<ExtraDataItem name="GUI/RecentFolderCD" value="C:/MyData/Bureau/Téléchargements"/>
<ExtraDataItem name="GUI/RecentFolderHD" value="E:/VirtualBox/Portable-VirtualBox/data/.VirtualBox/Machines/LinuxLive/HardDisks"/>
<ExtraDataItem name="GUI/RecentListCD" value="C:\MyData\Bureau\Téléchargements\ubuntu-13.10-server-i386.iso;"/>
<ExtraDataItem name="GUI/RecentListHD" value="E:\VirtualBox\Portable-VirtualBox\data\.VirtualBox\Machines\LinuxLive\Har dDisks\LinuxLive.vmdk;C:\Portable-VirtualBox\data\.VirtualBox\Machines\LinuxLive\Har dDisks\LinuxLive.vmdk;"/>
<ExtraDataItem name="GUI/SplitterSizes" value="159,606"/>
<ExtraDataItem name="GUI/SuppressMessages" value=",showRuntimeError.warning.FatPartitionDetec ted,confirmInputCapture,remindAboutAutoCapture,rem indAboutMouseIntegration,warnAboutInaccessibleMedi a"/>
<ExtraDataItem name="GUI/UpdateCheckCount" value="2"/>
<ExtraDataItem name="GUI/UpdateDate" value="never"/>
</ExtraData>
<MachineRegistry>
<MachineEntry uuid="{1a13e41e-884c-47a8-bbc3-9a070f1ba955}" src="Machines\LinuxLive\LinuxLive.vbox"/>
<MachineEntry uuid="{4cb986f3-8b78-49ab-b41b-43a536e8e053}" src="Machines\Debug\Debug.vbox"/>
</MachineRegistry>
<MediaRegistry>
<HardDisks/>
<DVDImages/>
<FloppyImages/>
</MediaRegistry>
<NetserviceRegistry>
<DHCPServers>
<DHCPServer networkName=<I edited this part out>
</DHCPServers>
</NetserviceRegistry>
<SystemProperties defaultMachineFolder="E:\VirtualBox\Portable-VirtualBox\data\.VirtualBox\Machines" defaultHardDiskFormat="VDI" VRDEAuthLibrary="VBoxAuth" webServiceAuthLibrary="VBoxAuth" LogHistoryCount="3" exclusiveHwVirt="false"/>
<USBDeviceFilters/>
</Global>
</VirtualBox>