line 46 can't open /dev/sr0： No Medium found

各位老鸟，我用easybcd安装ubuntu11.04时，开机能出现Ubuntu的安装选项，进去后出现以下这段文字：
(initramfs) /scripts/casper-premount/2-iso_scan: line 46 can't open /dev/sr0： No Medium found
Could not find the ISO/ ubuntu-10.04-dvd-i386.iso This could also happen if the file system is not clean because of an operating system crash, an interrupted boot process, an improper shutdown, or unplugging of a removable device without first unmounting or ejecting it. To fix this, simply reboot into windows, let it fully start, log in run 'chkdsk /r', then gracefully shut down and reboot back into windows. after this you should be able to reboot again and resume the installation.
然后就无法继续安装了？？敬请高手解决

我也遇到同样地问题……但是偶尔会进入安装界面的，看rp