Exporting database Oracle 7.3 on Windows NT 3.51 How to take dump files on Oracle7.3 running on Windows NT 3.51?

Should you stand in the Orant/bin folder and run one of the programs there like>

exp73 SYSTEM/password@[dbinstance] FULL=Y LOG=EXPORT.LOG


Did not work 


These services:
Ok here's what I did:

I was in the ORANT\BIN folder.

I had to figure out what the SID was for the DB. Did that via an Oracle client which I tried to connect remotely to Oracle on the server.

set oracle_sid=a

exp73.exe System/manager file=myexp13xxxx.dmp full=y log=mylog130527.log