Const wexRoot

I tried to open the WebExplorer in a popup window and i wanna to give the WebExplorer the wexRoot by a Request.QueryString parameter, so i tried to declarate wexRoot as dim.

First its look to work fine, but it dont let me to create new folders or files, so i have a problem... Can any one help me?

PD: sorry for my horrible english, i hope someone can understand me :)

Have you taken a look at the thread Variable folder path ?
Are you sure that you are keeping the correct value of wexRoot throughout page transitions?