IK Solvers Issue After Merging Files

Okay so I have this animation rig set up for a character with ik solvers on the lower legs which help the legs to bend more naturally by just grabbing one bone. So it works perfectly fine until I use append or link to add the bones the another file and now my ik solver just stiffens the leg when I grab the lower leg. I’ve been looking and can’t see any difference or reason why this would be, any ideas?

If you guys need any other info in order to help please let me know…

First thing i think about is: are there severall linked things having the same name as others being there allready?
Second: try a search on this forum. Your problem reminds me of something i’ve read here few weeks ago, i believe…
Sorry not to have the respons to give you right away! :o