Problem with multitasking matlab simulink in c#

I used c# Task class to run several Simulink simulations asynchronously as below: The code reads lines of data from a file and creates a task for each record. Each task opens a matlab single and runs a Simulink then gets back the result and adds it to a list. When I run my code on a regular pc, the code works fine and I can use the cpus up to 100% but The problem is when I run the same code on a server with 2 xeon cpus, each simulation task takes more time and also the cpus never get to 100% Struct Options{ // some variables here }

ForEach (var line in Lines) { Options op = new Optiones(){ //variables set based on line }; Task task = new Task(RunAsync, op); task.Run(); }

Private Void RunAsync(Object op) { MLapp.mlapp matlab; Type Matlabtype = Type.GetTypeFromProgID("Matlab.Application.Single"); Matlab = (MLApp.MLApp)Activator.CreatInstance(MatlabType);

// put some data into matlab // run Simulink // get back result and add it to a list matlab.Quit();