Hello fellow vogons

I have a Octek branded 256k COASt module that I am trying to get working on my Octek Rhino 6vX motherboard

The module is without a tag chip (the tag chip on the mobo is soldered on)

https://theretroweb.com/motherboards/s/octek-rhino-6vx#docs

Unfortunately when setting the jumpers the system posts but the cache isn't detected and shows none installed.

I've tried reseating the module, setting the jumpers on the module, alternating the jumpers on the mobo to no avail.

Any ideas?