If I put your code alone .. operation does well ..
But If I put this between Table Tag colimn resize operation might make problem ..
I could not yet reproduce this - the following page works fine (on my PC :-) both with IE and Moz:
<body>
<table style="height:100;width:100">
<tr>
<td>
<script>
var obj = new Active.Controls.Grid;
obj.setRowCount(20);
obj.setColumnCount(5);
obj.setDataText(function(i, j){return myData[i][j]});
obj.setColumnText(function(i){return myColumns[i]});
document.write(obj);
</script>
</td>
</tr>
</table>
</body>
Are you getting any script errors? using 0.2.0? which browser? Would be great if I can look at your page to reproduce the bug