If you are you sure about your account number and investor password, double check your broker server then.
Also make sure that you've clicked the Metatrader 4 Terminal blue button and not the MT5 one.

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hi
I try to signup as signal provider , but always failed, I receive comment ( authorization failed. Please check your trading account login and password). , I use investor as password and login my account number , both from mt4 information
I else change my investor password , because i was thought it is the problem , but it not
so please help me to solve the problem
I wait for your answers
thanks