PE. The trouble is that my sodium thiosulfate tests show a complete reversal of the notion that hypo forces anything. In my case it bleaches the positive image overall. Please refer to my response to Gerald for the amounts I am using.
OTOMH, I cannot remember the formula for D94, but I do know that Dektol is a paper developer. As such it is low solvent (Sulfite) and high in restrainer (Bromide) and these two may be your problem. Remember, what you are trying to do has been done by others with success.