Trouble completing the very first mission in Call of Duty 4 (Windows PC version)

Modern Warfare 2 Forum

Trouble completing the very first mission in Call ...

I just installed Call of Duty Modern Warfare 4 (on Windows 8 PC), which seems to be working fine.   However I somehow cannot get past the very first assignment, completing the indoor firing range.   I am able to walk to firing station 1, successfully aim at each target and fire.   Even though the rifle fires, nothing seems to result.   I get no instruction prompts.   After apparently hitting each target I then walk to the exit door, but cannot open it, so I remain stuck inside the indoor firing range.

Can someone please help this dummy?

Thanks,

Jedmondo

Jedmondo
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