problem with main block/sidebar and with less.bootstrap.less files

hi Gardner,
as your required i opened new thread, i'm sorry for the inconvenience.

yes i loaded the block: mainbody-copy.

how can i remove a sidebar-2?

when in firebug i see this path: less.boostrap.less , i can find this file or in t3-assets folder or in plugin folder. is this correct or i don't understand something?

and i can't login with any other computers, just with this. all the other give me an error for maintenance. is your website still in mantenance?

i know it's boring for you, but these things i really can't understand.