Hello.

I am trying to buy some hashrates.  Im a total beginner by the way.  I am trying to Mine bitcoin through slush pool.com.

The algorithm I am using is sha256.  Stratum+TCP://stratum.slushpool.com port 3333.  And my username and a generic password.  It accepts the trade but after 15 secs it goes dead. Why?
I am from Europe so I am using the European servers on nicehash.
Please help me.