Test execution in parallel via visual studio, Tests are getting skipped

I'm using VS2013, running 120 c# selenium tests, with a .testsetting file that contains the following parameters Execution parallelTestCount="5" and test timeout of 6000ms(6 seconds). The tests duartion are more than 6 seconds, I used this configuration to reproduce the problem. After 6 seconds 5 tests are failing and the rest are skipped. This is what i'm getting in the output window: "Test run is aborting on Machine-Name, number of hung tests exceeds maximum allowable '5'."