用usb重灌ubuntu作業系統 - Linux

[問題描敘]
用unetboothin將ubuntu server 14.04 64位元的ios檔
燒在usb裡重灌電腦

已將bois介面調至USB HDD
並成成進入安裝ubuntu server的介面

但是出現如下的錯誤訊息
there was a promblem reading data from the CD-ROM.
please make sure it is in the drive .
If retrying does not work,
you should check the intergrity of your CD-ROM.

Failed to copy from CD-ROM . retry?
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選yes重試也是一樣畫面
選no會出現如下息訊:
an installation step failed. you can try to run the failing item again from
the menu,
or skip it and choose something else.
the failing step is :
load installer components from CD
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請問是哪出了問題嗎?


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