I've had The Witcher 2 since launch, and with the enhanced edition out ans the fact that I haven't played it in 2 years, i decided to re-download it and give it another playthrough.

However, when importing my TW1 save file that has Raven armor in it, Geralt isn't wearing it at all. I also don't have my swords, it's just all default. Also, I used several mods back 2 years ago that worked fine. I reinstalled the 2 that I remembered: Zero weight and Return of the white wolf. While in game, Geralt does not have white hair, it's the default grey. I then reloaded an older save where I have a lot of stuff in my inventory to see if the other mod was working, and it's not, all the items all have weight. I checked, people are all using these mods with the Enhanced Edition, so why is it not working for me? I installed them the exact same way as before.

On top of all that I'm getting terrible FPS. I'm using the same settings as before, and I have the same computer hardware. I have no performance problems with any of my other games.
Am I missing something here? Does anyone have the slightest Idea of what the hell is going on? It's really pissing me off.

It is likely due to incompatible or outdated mod. There's no other explanation. It has been 2 long years, the latest version has underwent lots of tweak, addition, change here and there.