As the message says, you got locked for a POSSIBLE speedhack, the server can't be sure if you're just experiencing a huge ass lag spike or got a wrong configured CPU speed ( which causes your game to run faster ) and just kicks you to protect the server. Most of these speedhackalerts are false detections what made me make that "speedhack" check more tolerant in the last CoAdmin updates. But it still sometimes rarerly kicks people who are beyond the server time (speedhack) because of lags / cpu problems. Its also possible that something really caused that CPU bug on your pc(power schemes,cool'n'quiet etc. can do this), which made your Rune run faster. Well anyways you probably didn't understand a shit of this, just sayin' that no one was fuckin with you nor did you use speedhack.
As Slade already mentioned, nobody was fucking with you. The automatic kick was necessary to protect the server. Most of these detections are false but worth it when someone actually wants to crash the server.