Mod won't activate

[jammi]

Recently I've been asked to beta test a mod, which I couldn't use because FL would crash before the menu, when I've tried to re-activate discovery, it won't do it. Gets about halfway through reactivating then comes up with this:

Error: FLMM has determined that 'Discovery mod v4.84' won't properly activate.

This was only a test run, so no files were changed (besides being uncompressed).
Look in the log for more details.

I have tried deleting all autosaves, deleting all saves, restored backups, deleting all the mods I have downloaded and still it won't activate. After all the above I checked the activate/deactivate log and found:
data\characters\costumes.ini' doesn't exist
so I deleted discovery and redownloaded it, and attempted to reactivate. In vain. It still won't activate and I've even uninstalled/reinstalled FLMM twice!! Please help!

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