Millisecond Forums

Hi,

I'm having trouble using checkboxes. I want to display a list of options from which participants can select up to six - but only two are correct. It works correctly until I add 'correctresponse' which makes the question stay red and doesn't allow me to answer the question. Script below - 

<survey memorytest>
/ pages = [1 = p1]
</survey>

<surveypage p1>
/ questions = [1 = q1]
/ showquestionnumbers = false
</surveypage>

<checkboxes q1>
/ caption = "Please choose a maximum of six options you saw previously in the experiment:"
/ options = ("Cadbury", "Twix", "Wrong", "Wrong", "Wrong", "Wrong", "Wrong", "Wrong")
/ range = (1,6)
/ order = random
/ correctresponse = ("Cadbury", "Twix")
</checkboxes>

What is the issue here? Also is there a way of including number or correct answers in my summary data - I don't care which ones they got right (cadbury or twix), only how many.

Thanks,
Jenny