Why Ra doesn't make contact with Carla and Jim after Don's suicide??

[Sacred Fool]

 
Ra seems to feel that the trance channeling is a rather dangerous endeavour.

68.12 Questioner: It would seem to me that since I can’t imagine anything anything worse, shall I say, than this particular result, other than possibly the total disintegration of the mind/body/spirit complex due to nuclear bomb, that it would be very advisable to seek out the magical training and defense for this situation. Could Ra and would Ra instruct in this type of magical defense?

Ra: I am Ra. This request lies beyond the first distortion. The entity seeking magical ability must do so in a certain manner. We may give instructions of a general nature. This we have already done. The instrument has begun the process of balancing the self. This is a lengthy process.

To take an entity before it is ready and offer it the scepter of magical power is to infringe in an unbalanced manner. We may suggest with some asperity that the instrument never call upon Ra in any way while unprotected by the configuration which is at this time present.

In other words, to do so would risk her being taken off to an higher density negative time/space captivity.