If that doesn't work, test using MemcardRex and converting your .mcd file to .mcr and then renaming it as I explained above.
Yess! It works! Thank you very much!
Simplified process:Take .mcd file (its the whole memory card file from fpse) Use MemcardRex and open it. Save As with .mcr format. Now name it to the exact rom name with .srm format
And it should work.