After translation of the default.po, what should I save the .mo file as?

Hi,

I have translated the "default.po" and saved it as "bp-corporate-sv_SE.mo". I cretated a languages directory in the Corporate Child theme. How ever it doesn't work out. Have tried several different combinations to trigg the the .mo file - nothing seems to work. What am I doing wrong?
Please advise!

Thanks in advance!