How to load SOFA external plugins into Unity via SofaUnity?

[amazonXL]

I have been using SOFA to develop a simulation scene that incorporates my own external plugins, but I am currently unable to load these plugins into Unity via SofaUnity. I tried placing the plugin DLL file from SOFA into the Assets\SofaUnity\Core\Plugins\Native\x64\ folder, but it didn't work. I'm using SOFA v25.06 and Unity 2021.3.33f1c1.
Thank you in advance.