ISO124: iso124 not working as expected

Part Number: ISO124

I breadboard an iso124 circuit and 2 TI dcpo1b 15v supplies. I double checked my connections.

I am using the plastic .1 gridded breadboard for thi prototype.  - Is this possibly the problem?

I noticed in the app note that "no conductive materia ie traces can be undeneath the chip.

Along that same line how far away does the chip have to be from say a metal enclosure.