I am concerned about not being able to draw sap at or just above the soil line but not ready to condemn it. To me the color of the cutting looks ok. How does it feel at the soil line? I think you should also look for spider mites causing the issue.

Of course you should also look at the moisture levels being too high in the soil and use a heat mat to warm the soil.

Okay well this morning I did just put it on a heat mat set for 75 f, if that's too warm let me know. As for how it feels it's still hard. Are these plants like cactus where they much prefer to be dry as a far then too have water

Is it possible that it's rotting

Yes when they are being rooted they generally prefer dryer conditions. Once established they can survive high levels of moisture. Perhaps you are familiar with some cousins....Oleanders, Vincas, and Jasmines?

if you can set the heat mat higher it will be fine. I always used the on/off kind of heat mat that got to a certain temp and just stayed there. By early summer with an O.A. temp of 95F I have registered surface temps in containers over 100F and interior temps in the 80s-90s depending on container size.

So just to recap you cannot draw white sap near the soil line but can further up. It is not soft at the soil line either. How far up do you have to go to draw sap?

So far to get white sap I have to go pretty much to the top. I mean it doesn't run out of the hole but it's not till pretty much the top 3 inches where all the new growth is that I start to find white sap. I also took off the black leaf and as soon as I did the spot where the leaf is filled instantly with sap. I just turned the heating mat up too 90 f and the soil is starting g to dry out so I'm going to continue like that and see what happens. Unless you have another idea that would help. If so please help.

I agree. Give it a shot and see what happens.