Faild to open, No error info.

[Ason]

Hey i have a VM with XP that rum on Windows 7 64bit.
To day i was going to change UUID on a copy that i have and was follow a guide that i found.

And know i cant open my VM,
I have this errror:
Failed to open a session for the virtual machine Eplan.

No error info.

Result Code: E_FAIL (0x80004005)
Component: ProgressProxy
Interface: IProgress {c20238e4-3221-4d3f-8891-81ce92d9f913}

Is there any chance to get my VM back?
what log files do i need to look in?

[Ason]

here is the guide i was follow:
change "\" to dots
www\sysprobs\com/copy-virtualbox-vdi-windows-explorer-change-uuid-vdi-cloning-easy