bank memory problem

Recommended by Wim's BIOS...

I have a 586 with a SOYO 5TA2 motherboard (7/12/95 triton 2A59CS2HC-00 and Intel FX Chipset) with 2 banks(0 and 1) of SIMM memory and i´ve instaled with 4 memory sticks 8mbs each (all equals)and the problem is that in bank 0 only detects 8 mbs when should be 16mb. I ´ve tried to change them ones with others;then just 1 bank ,then the other bank and same thing happens,so there´s no problem with the memories themselves.The motherbord manual says it can support from 4mbs to 128mbs
is there anything that can be done to solve the problem?

[Rainbow]

Get the latest BIOS. There's
08/22/97-i430FX-2A59CS2HC-00
TAN-0823
at http://www.soyousa.com/bios/586supp/5tan0823.bin
Backup your BIOS before flashing.

well i´ve upgraded the bios but the memory problem still persists
i´ve cleared the cmos after the and still nothing.tried also take out the simms and put them again
but that didn´t solve