Selecting a time range

Hi gang. Ima Newbie and stuck. I'm trying to display active records in a table on my web page. However, to minimize maintenance, I only want to display records that are up to 48 hours old at any point. Here's my code so far:

Code:

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$query="SELECT * from birthdays where Active='1' AND Event='request' AND hour(DateEntered)< 48";

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Where "Active" is a flag at 1/0..."Event" is populated and "DateEntered" is a system TimeStamp of the record creation.

I have 11 Active records total that are active and 5 that are active AND 48 hours old, or less, so my page should return 5 records. It's returning all 11.

Any help?

Code:

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$query="SELECT * from birthdays where Active='1' AND Event='request' AND DateEntered > (NOW()-86400*2)";

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Was the answer. Got it fixed. Thanks all