I have configured a stack of 2x N1148-ON and needed a fiber link to a X1052P. I have bench tested it and it worked great until I moved it to it's location and the link doesnt work. Im using the same SFP-10g-SR as I was on the bench. Im not sure what changes happen when I move it. 

Any help in figuring this out would be great. I don't think Ive ever had an issue with switches like this before. 

Thanks!!