Why do my impulses sound gated?

Loren Littlejohn

Lover of all boobage.
When they are not. Am I converting it wrong? This is an example of one, you can hear it just stop. Plus this example is with the "stretch" knob dimed.

This is a large empty apartment (open floor plan, it's a studio) with 16'+ ceilings (they arch up) and one brick wall so I thought it would be a cool space to capture. My audio file has none of the superior 2.0 room sounds on it, there is also no gate or any processing on the impulse file other than like I said I have the stretch knob in SIR 2 dimed.

What am I doing wrong? How do impulse? Do I need to cut the sine wav longer (the recorded one not the one I used)?

Thanks for the help:

Apartment.wav