ListGrid scrollbar doesn't work in smartGWT 2.1

I am facing problem with the ListGrid scroll bars.

the vertical scrollbar works only on mouse scroll but not on mouse click.
and the horizontal scroll bar doesn’t work at all.

Also i have set grid.setFixedFieldWidths(false); for autosizing the coulmn width to the grid cell contents. But the header doesn’t autosize which is mentioned in the doc but is there any way by which we can align the column headers as well when the cells are autosized?

ISOMORPHIC any solutions for these 2 problems?

Regards,
Sanket