Just starting with Liquibase - please help.

I am trying to start working with Liquibase, but I have some difficulties,

I have tested my connection string to SQL-Server with SQuirrel and the connection test succeeded.

I have tried for the last two days several solutions, but I can't figure out why the initial update fails :

This is my code :

liquibase --driver=com.microsoft.sqlserver.jdbc.SQLServerDriver --classpath="C:\Program Files\Microsoft JDBC Driver 4.0 for SQL Server\sqljdbc_4.0\enu\sqljdbc4.jar" --changeLogFile=databaseChangeLog.sql --url="jdbc:sqlserver://it-dev-01\DataCenter;databaseName=MyDatabase" --username=Liquibase --password=Liquibase update

This is the output :

Unexpected error running Liquibase: Unexpected value databaseName: parameters must start with a '--'

SEVERE 14:38 02/02/16: liquibase: Unexpected value databaseName: parameters must start with a '--'

liquibase.exception.CommandLineParsingException: Unexpected value databaseName: parameters must start with a '--'

    at liquibase.integration.commandline.Main.parseOptions(Main.java:740)

    at liquibase.integration.commandline.Main.run(Main.java:129)

    at liquibase.integration.commandline.Main.main(Main.java:99)