Ok I did it :)

So in the end it seems my both saves were bad.
I downloaded 3rd save from http://emusaves.emuunlim.com/saves/dexdrive/saves.htm, converted to .mcr with mem manager
and just placed it as .srm file in my folder. Then in Tekken3 I went to options and did: card load.

Second memory card was not necessary.

Thank you for your support.