Problem in ComboBox

I have a combobox in one of my access form. I am using a
query to populate the combobox. When i am setting the
BoundColumn property to a nonzero value, i am getting a
truncated list in the combobox. But when i am using
boundcolumn property as 0 or blank, i am getting full list
in the combobox. Any pointers to this problem and it's
solution will be highly appreciated.
As suggested by some programmer i have matched the column count of the query populating the combobox, Column Count property of the combo box and Column Widths (i have mentioned widths for all the columns) property of the combobox, But this didn't help. Please help