i have a problem with setup Express 13 on Windows XP SP3 hosted as guest OS on top of Virtual Box.

I've installed Windows XP, then Service Pack 3, but installer doesn't go to installation proccess with message:
'Service Pack installed is wrong'.

There is any advice to go further?

Previously I've installed Express 12 on the same kind of virtual machine and there was no errors at all.

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I could stay at version 12 but backup done by arcmain on 13 crashes when I try to restore it on '12' (with message 'backup is corrupted'). That's why I have to install another VM with '13'.