C# – Moq verify method fails even though method will be called

I have some troubles using Moq. Following unit test throws an exception, even though the according method will be called.

[TestMethod]
public void CreateFinishTest() {
    // mock methods 
    factoryMock.Setup(f => f.LoadPlan("TestPlanDoNotUse")).Returns(testPlan).Verifiable();
    factoryMock.Setup(f => f.CreateFinish(It.IsAny<CreateFinishMessage>(), It.IsAny<string>())).Returns(testFinish.Id).Verifiable();

    try {
        var cfm = new CreateFinishMessage() {
            ClientId = 11,
            MessageId = 23456,
            CustomerId = 6,
            FinishName = "MyFinish",
            PlanId = "TestPlanDoNotUse"
        };
        var cmd = sysCfg.Executor.CreateFinish(cfm); // calls LoadPlan with cfm.PlanId and CreateFinish with cfm and cfm.PlanId
        sysCfg.Executor.Execute(cmd);

        factoryMock.Verify(f => f.LoadPlan("TestPlanDoNotUse"), Times.Exactly(1));
        factoryMock.Verify(f => f.CreateFinish(It.IsAny<CreateFinishMessage>(), It.IsAny<string>()), Times.Exactly(1));
    } catch (Exception exc) {
        Assert.Fail(exc.Message);
    }
}

This Error occurs:

Expected invocation on the mock exactly 1 times, but was 0 times: f => f.LoadPlan("TestPlanDoNotUse")

Configured setups:
f => f.LoadPlan("TestPlanDoNotUse"), Times.Once

Performed invocations:
IFactory.LoadPlan("TestPlanDoNotUse")
Factory.CreateFinish(IndiValue.LiveMarket.IndiCore.Communication.MessagingFormat.CreateFinishMessage, "MyFinish")

I've tried several different Verify-Calls but it won't work. And the Error which occurs seems quite confusing it's says that LoadPlan("TestPlanDoNotUse") is never called, but it's listed @ Performed invocations.

Problem solved:

I think i found the problem, it wasn't a Moq problem. In sysCfg.Executor.CreateFinish(cfm) a new thread was created and started. This thread wasn't finished and so factoryMock.Verify(...) failed.

I used AutoResetEvents:

// create AutoResetEvent triggers
AutoResetEvent m_testTrigger1 = new AutoResetEvent(false);

// mock methods     
factoryMock.Setup(f => f.LoadPlan(It.IsAny<string>())).Returns(testPlan).Callback(() => m_testTrigger1.Set());

// do something

// wait for triggers
bool didReturn1 = m_testTrigger1.WaitOne(timeOut);