BERLIN, NJ (CBS) – Doctors revealed the reason why a kidney transplant arranged by Craigslist had to be cancelled at the last minute.

Doctors say the potential donor, Glenn Calderbank, of West Berlin, has liver disease.

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His condition was discovered by doctors on Tuesday, the day the transplant was supposed to happen.

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Calderbank made national headlines after her stumbled upon a Craigslist ad. It was posted by the husband of a local woman with renal failure who needed a kidney.

Calderbank offered to help and it was a match.

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But his disease means he is ineligible to donate organs.