A setup along these lines should work (tested with Inquisit 2.0.61004.7):
<likert mylikert>
/ stimulusframes = [1=erase, question]
/ responsemessage = (anyresponse, registered, 0)
/ trialduration = 13000
</likert>
<text question>
/ items = ("Q1", "Q2", "Q3", "Q4")
/ position = (50%, 30%)
/ select = sequence
</text>
<text registered>
/ items = ("Response registered. Please wait for the next question!")
/ position = (50%, 70%)
/ erase = false
</text>
<shape erase>
/ shape = rectangle
/ size = (100%, 100%)
/ color = (255, 255, 255)
</shape>
<block myblock>
/ trials = [1-4=mylikert]
</block>
<expt>
/ blocks = [1=myblock]
</expt>
Best wishes from a fellow Inquisit user,
~Dave