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What version of XOOPS and what php version are you running? It might be that cjay content is incompatible with one or other (or both!) of yours.
Also, IIRC, there's a security issue with cjay content that has been exploited in the past.
Have you considered using a different content module? I've used SmartSection 2.13 on both php4 and php5 without a problem, if that helps?