SQL & PL/SQL

I am trying to unpivot these columns using the "unpivot" command. the command works, but the only value returned is that of the first column in the "IN" clause:

select * from DEMAND_FACTS_LOAD
UNPIVOT
(Measure_Amts for Measures IN (
ELE_FUEL_CONSUMPTION,
NET_GENERATION_MWH,
IND_FUEL_CONSUPMTION,
TOTAL_FUEL_CONSUMPTION,
AVG_NET_GENERATION_MWH,
ELECTRIC_MMBTU
))

All of the columns are numeric and only the first column - FUEL_CONSUMPTION - returns its values unpivoted. The remaining columns (unpivoted rows) do not pivot! The other columns to be pivoted all contain numeric data in them. Any insight would be appreciated.