Your config is OK and is having the desired affect. So the hang in both versions of the NUnit Gui only occurs when nunit is running nunit-agent. That error would need to be dealt with, but it's apparently a separate one.
Have you tried running NUnit 2.6.0 with the same config change? My guess is that it will run OK.
What do I need to install in order to run your test case?
Your config is OK and is having the desired affect. So the hang in both versions of the NUnit Gui only occurs when nunit is running nunit-agent. That error would need to be dealt with, but it's apparently a separate one.
Have you tried running NUnit 2.6.0 with the same config change? My guess is that it will run OK.
What do I need to install in order to run your test case?