writing over tables

Hi,

I have a table in a two columns page PDF document. I use the attribut span
="all" on the table.
When I generate my document, the table is placed correctly in the page.
The text which follows it starts in the first column thereafter, is written
in the second over the table.
The good behaviour would be written in the second column following the
table.
Do you know how can I correct this problem ?

-------------------------------- S.Peyronny