Two things: One, your comics weren't really about the office. Some of them may have taken place there but they weren't really about working there. It lacked the office-like demeanor that something like "Office Spaced" (or whatever that movie is called, I can't remember) had.
Two: The punchline lacked... well... punch! It didn't really get the me thinking "Wow, that was funny and not expectable at all" or "That has definately NOT been done before"
Sorry for rambling. Anyway, as the dude above me said, keep trying. I see a real broad horizon for this type of comic, you just have to work at the humor a little more.
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Two Iraqis walked into a bar...