Hi all, I am trying to stack two MXL 40/10 by using 40GB fixed interface on MXL 40/40 module but when i give the command "stack-unit 0 stack-group 0" i get this error :" %error: Cannot configure stack Group when FC module is enabled". On modular slots of MXL 40/10 module there are installed two FC Module 4port FC, is this the problem? Does it mean that i can't make a stack with FC Module installed? Many thanks in adavance for every reply. Regards angelo