IF YOU USED A SMT CRYSTAL:
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Double check the crystal pinout if you used a surface mount crystal. I've seen identical packages from different vendors wherein the crystal pinouts were between different pin pairs.

A KIT, WIREWRAP, OR YOUR PCB DESIGN?
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Is this a board you designed or a kit you built? That can simply our responses.

IF YOU WIREWRAPPED THE CIRCUIT
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I'm probably the only guy left with a wirewrap tool. But if you did a wirewrap design, DO NOT USE WIREWRAP for the crystal. The leads need to be short and I always solder the crystal and caps directly to the pin pads. I even clip the WIREWRAP pins off of those pins to make room (who needs the extra antennas anyway?).

-Jay C. Box

PS:
The first and simplest thing to do is to replace that caps. Make sure you have the correct technology caps, don't use electrolytics, I think ceramic caps are the right selection (some one will correct me if need be).