Second HDD in Acer laptop instead of dvd drive. Bios problems, Freeze at bios

Hello,
I've bought sata-sata optical bay caddy, installed in my Acer Aspire 5553g

When I connect second hdd(using caddy), laptop freezes at bios POST checks, no errors, but when it should boot up Operating System nothing happens. As normally it shows Press F2 to enter setup. If I press it, laptop reacts, shows entering setup and again - nothing happens. I can`t even enter bios setup!!.

If I connect just 1 hdd, no matter which one or in caddy or not, everything works fine, hdd speed is good(so caddy works).

Tried:

update bios to newest
format second hdd
connect second hdd on working laptop
changed various settings in bios setup, saved, just then connected second hdd.
press many times F2 to enter bios setup earlier
flashed modified bios no succes

in bios says that max number of hdd's is 8 . although he have just 2 SATA physically on motherboard. IT seems that somewhere in bios is some stupid option is ON that he needs to recognize 2. sata device as ODD and that making freeze s+++ situation.

Please help

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HrVr000

I will say that i have 5552G and there was no problem adding 2 hdd in cuddy. and 5552g use the same chipset rs880m+sb820 so can someone tell me where in bios modules find module for south bridge and Is it possible to port it into bios of 5553g because I assume there is problem, no problem if I brick bios. cause I have programator so I can bring it back anyway lol