Distributed Computing Toolbox is an outdated name. Today, the products you could mean are Parallel Computing Toolbox or MATLAB Distributed Computing Server. But maybe you are using an older release. Please clarify.
But in general it seems you are a new customer - or have newly purchased - and struggle with setting up the infrastructure. Here I suggest to contact MathWorks. Either Technical Support / Installation Support with specific questions, or the person you have worked with within the evaluation.
