I can't tell from what you've written here if the agent requested pages or just acknowledged that they were rejecting you. Either way, it's doubtful that they'll be too interested. If they requested pages, then your MS is still going to have the exact same things that disinterested them the first time, and if they didn't request anything, then they're probably still not interested. The only reason I could say requerying could have a shot is if they never read pages and just rejected based off the query, and you're coming back with a much better query, but even then... odds are low. The good news: there are so many agents out there, so rather than concern yourself about this one agent, just make sure your MS and query are as good as possible (if you haven't already, post your query on the critique board for feedback; and I've had a lot of success with the wanted ads for finding some good critique partners), and then you can dive into the whole query process anew.
If you appreciated my feedback, I'd appreciate yours: Ouroboros
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