[Plugin: WP-Table Reloaded] Centering the table in the post

I have set this

.wp-table-reloaded-id-8 {
width: 200px!important;
height: 200px!important;
}

but I want it to be shown in the center of the post. Help!

http://ww.wp.xz.cn/extend/plugins/wp-table-reloaded/