I thought I had both of these mods installed and working earlier, but then I re-did everything after installing FCOM (yikes!), and now I can't get to UFF's Tanduff Island.

I can Tanduff island in the distance from Anvil, but when I approach it, the island disappears (it looks like it happens right when the game tries to switch from a LOD view to and actual view of the island).

Should these two mods be able to work together? Or are they just incompatible?