You have not explained what exactly you have and what you have tried to do, so it is difficult to know how best to help. Assuming you have a table like:
I would:
1) Select the table.
2) Insert -> chart -> stacked column chart. Excel will assume that I meant "data series in columns" and give me a stacked column chart with 3 columns over 3 separate categories.
3) Since I intended to have "data in rows", I find the "switch rows/columns" button (in 2007, it is on the Chart Option ribbon) and execute. I end up with a single stacked column with 3 sections.
I made a lot of assumptions there, but that's what I would expect to do.
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