Unwanted White Line.......please help

Can anyone else see two fine white lines through this pattern.....it divides the page into 3. I made a pattern fill but the sqaure selection box was around two of the leaves so I know its not caused by me not selecting the pattern correctly as there would be even more white bits plus the white line is in the wrong position for this. The line shows very finely when I print out the sheet.....does anyone know the cause and how I get rid of it? The pattern was created with Draw