Can someone please help me

I have my dragonmint T1 (16TH) bitcoin miner all set up and in a cooling system i connect it to the internet and followed your youtube video on how to set it up and i connect it to the SlushPool Bitcoin server and it says everthing is okay and all the pools are alive and the miner is alive it runs for about 30 minutes and then says the miner is offline on the slushpool dashboard but when i look back on the Draginmint dashboard it still says the pools are alive i leave it for a few hour and nothing changes am i doing something wrong please can someone help me please???
Many thanks