Excel 2007 : Cell displays all #######,

I have a spreadsheet that I used for both numbers and text. In one of the columns, only text is entered. In one of the cells, I have entered some text (well below the 1024 character count) and when I click off the cell, all that is displayed in the cell is a row of # signs. If I click on the cell, the formula bar shows the text, but only the # sign still shows in the cell. What am I doing wrong?