Width of the columns in GridView is not fixed

[NerdendSync]

I try different "properties":

• ItemStyle-Width
• ControlStyle-Width
• HeaderStyle-Width

I set ItemStyle-Wrap in "true".I use css class:\[code\].wraptext{ word-wrap:break-word; -ms-word-wrap: break-word; -moz-word-wrap: break-word; -webkit-word-wrap: break-word;}\[/code\]It didn't help me