XiaoBaiTu, Can you help me with following question?

Hi,
I sent a 485 name check inquery letter to FBI and received a letter back last week.

The main body of the letter is as follows:
We concentrate on identifying main files in the central records system at FBI Headquarters.No records responsive to your FOIPA request were located by a search of the automated indices.

Could you tell me what does it mean? does it mean my name check is cleared or it doesn't mean anything at all.

Thanks,