anyone a idea?

[Husher]

When i try too activate this message appears in my FLMM.

Error: problem activating 'Discovery Mod v4.85 beta 2'
Error: SHCopyFile failed ('C:\Program Files\Freelancer Mod Manager\mods\Discovery4852beta\EXE\Freelancer.exe' to 'C:\Program Files\Microsoft Games\Freelancer\EXE\Freelancer.exe')

Because server was full i decided too try some in SP.
When i deactivated the mod and would activate it again i got this.
I played the mod so i know it works.

I downloaded and installed the mod and the FLMM already again.

Any ideas beside complete reinstall of freelancer?
I play it on several acc. on my pc because my FLAM doesnt work either but thats not a problem yet.
Should i reinstall FLMM and mod on all three computer accounts again or is this useless.

Hope some of you can give me some advice.

greetz