doesnt read, read speeds properly

i installed a 64gb crucial m4 in my 2.3ghz 2011 mac mini. and tried to run this. it ran normaly for the write speeds, but when it came to read, it gave me an automatic 15! and skipped back to write. tried deleting, redownliding, restarting nothing helps. PLZ FIX!

Mathius99 about Blackmagic Disk Speed Test, v2.2