Configure SharePoint Product Configuration Wizard problem

Question

Hi,

    I have installed Sharepoint 2013 in one windows server and SQL installed in another windows server..My Problem is when i configure Specify configuration Database settings in Sharepoint product configuration wizard  it shows the error "The Username is invaild.The account must be a valid domain account" and my sharepoint server and SQL server are domain account.Please help me to solve the issue..

 

 

     Thanks