Kipper2k 4 MB fastRAM expansion not work with A2000

[Blizzard 128 MB]

My Kipper2k 4 MB fastRAM expansion not work with A2000.
http://www.bigbookofamigahardware.com/bboah/product.aspx?id=1950

Why? All kipper expansion work with A500, A1000, A2000, CDTV.
The CF card version work with A2000.
http://www.kipper2k.com/amigaforsale/oldpage.html
http://www.kipper2k.com/a500fastmem.html

[Blizzard 128 MB]

I installed kipper 4 MB expansion to the CPU socket, no Zorro II or other card. Boot from floppy OK, 1 MB chipRAM, 0 MB other mem. The machine work, but 1 MB only, no CPU contact problem.
The kipper card work OK with A500.
All kipper cards work with A500, 2000, 1000. IDECF+fastRAM. The simple fastRAM expansion why not?

[Blizzard 128 MB]

Motherboard 6.0