Ultra noob questions

I am a complete novice when it comes to OpenVMS and I'm stumbling. Downloaded and burnt CD for Alpha84.iso so am trying to install OpenVMS.

When I power up FreeAXP and try to boot I get this:

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┌─┬─┬─┬─┬─┬─┬─┐ V i r t u a l serial0
│F│r│e│e│A│X│P│ A l p h a on emulator BASELOG (128 M<img src='../images/smiley/cool.gif' alt='smiley'>
└─┴─┴─┴─┴─┴─┴─┘ x86 version 2.4.1.502

ff.fe.fd.fc.fb.fa.f9.f8.f7.f6.f5.
ef.df.ee.ed.ec.f4.eb.ea.e9.e8.e7.e6.....e5.
V7.0-9, built on Mar 18 1999 at 13:25:37
&gt;&gt;&gt;sh device
dka0.0.0.6.0 DKA0 RRD42 4.5d
dva0.0.0.0.1 DVA0
ewa0.0.0.11.0 EWA0 02-18-DE-20-C5-D9
pka0.7.0.6.0 PKA0 SCSI Bus ID 7
&gt;&gt;&gt;boot dka0
(boot dka0.0.0.6.0 -flags 0)
block 0 of dka0.0.0.6.0 is not a valid boot block
bootstrap failure

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I need an Idiot's Guide but in the meantime can anyone advise on how I can get over this initial stumble?

TIA

Problem solved <img src='../images/smiley/smile.gif' alt='smiley'>

I had inadvertently made my 512 mb disk a CD also. Setting another disk as CD allows me to boot.