reticle problem

[ingeloop]

hi there everyone!
i have a problem with changing the reticles in navy sealsV2.
i find the reticles in the navy seals mod to big and not to my liking.
therefor i tried to copy the originals to diff gun-files in the mod.
it has worked fine in several other mods. why not in this one?

i get this message from the ike.log:

***** User's system configuration *****
      CPU: 272
      RAM: 896 MB
      O/S: 4145
Ghost Recon (RELEASE)  version = 1.4.0.0(0)
GunFile: Invalid XML root node
IkeDataMgr: Could not load gun file \mods\navy seals_v2\equip\ar_m4_masterkey.gun
IkeGameMgr::Initialize() : Could not initialize DATA_MGR: -1

hope someone can shed some light.
best regards/ingeloop