mikrotik installation error

i want to install mikrotik server on my pc so for this purpose i make a bootable usb of your cd image iso file. When i plug into my pc and boot it than it says driversloading… after this it show me Hard drive selected as SATA-1 than it show me the error like this “Fetal Error CD-Rom Not Found” it is the error i am trying to resolve it but i can’t resolve it so please tell me the solution of this error so that i will install the server and enjoy your services.
i hope you will help me.