MFX OP1a transcoded with adobe media encoder

Hi 

I transcode a lot of footage with media encoder CC 2015. 

When I try to AMA link MXF OP1a transcoded with media encoder in Media composer 5.5.5 I have no sound. 

I have 8 mono empty tracks with no sound

I have tried to AMA link with Media composer 8.5 and it works great. 

I run the last version of AMA MXf plugin (1.4.1)

Does anybody have encountered this issue on media composer 5.5.5 ?