DLC won't activate

[Brook1981]

I bought (steam traded really) Dead Money, Honest Hearts, Old World Blues, Courier's stash and the Gun Runners Arsenal a few days back and had them installed. Unfortunately when I try to activate them in the 'Data Files' option on the launcher they become unchecked when I close the window, and when I use NMM I get an error that says:

 

Nexus Mod Manager has encountered an error and needs to close.

A Trace Log was created at:

C:\Users\owner\Documents\Nexus Mod Manager\TraceLog20120716115533.txt

Please include the contents of that file if you want to make a bug report:

http://forums.nexusmods.com/index.php?/tracker/project-3-mod-manager-open-beta/

 

**Trace Log Attached**

[micalov]

Try verifying your NV install on steam to make sure they downloaded properly (right click steam in library and properties> local files> verify lccal cache), but are they actually loading in game full stop? (you should get annoying popup messages about them) because even if unchecked, steam will download something called a .NAM file that force loads the esm/esp(s) with the corresponding name for them.

[luthienanarion]

BOSS_API_ERROR_FILE_WRITE_FAIL: "C:\Users\owner\AppData\Local\FalloutNV\plugins.txt" cannot be written to!

 

Make sure that the file is not set to read-only and that regular users have write permissions to that file/folder.