When receiving error messages invalid account/authorization failed / unauthorized this relates to you either entering your password incorrectly or choosing the wrong server.
Please be sure to select mt4.nashmarkets.com (NashMarkets-Live) as the server when logging in to a real account.
For Demo Accounts, the selection should be NashMarkets-Demo (demo.nashmarkets.com). If the server selection is not the issue, please try resetting your MetaTrader password.
This can be done from the My Accounts section by following the below steps;
- Click on My Accounts
- Click on View on the account in question
- Click Actions
- Click Copy the password and then click on Submit on the system generated password
Please make sure to click on "Submit" as the process will not work without it.