Downgrade Digital Station B from 9.0 to 5.0(26)

[Swiney52]

I am working on a system that is running 5.0(26). They purchased a new Digital Station B expansion. The expansion is running 9.0 so I am assuming I need to downgrade it. What is the process to do this. I was told that I should be able to go file-> advanced-> upgrade then select the expansion and downgrade it to 5.0(26) (which is the manager version I have installed) but when I do the expansion is grayed out so that way does not work.
Thanks

 

[tlpeter]

You can't and if you have read the docs you would know that it can't go back to 5.0
You will need to upgrade the ipo took get it working.
But then you need to be sure that the system can go up to 9.0 at all.

BAZINGA!

I'm not insane, my mother had me tested!

 

[intrigrant]

Or buy a used DS expansion module on the internet (at your own risk that is)