I just did this and it worked fine. What VM are you using? To find out, 
press F2 and choose "display version information".

Cheers,
   - Andreas

Trygve Reenskaug wrote:
> I try to open Monticello on my own repository:
>   Squeak3.10.gamma.7159.3.image
>      open.. MonticelloBrowser
>         +Repository/HTTP/
>             MCHttpRepository
>                location: 'http://folk.uio.no/trygver/babymc/'
>                user: ''           (The repository is unprotected)
>                password: ''  (The repository is unprotected)
>            accept
> Repository appears in the repository list.
> Then I try to open it
>      open (above repository)
> Bad result:
> SORRY  BUT THE VM HAS CRASHED
> 
> 
> Grateful for hints
> --Trygve
> 
> (I know I am supposed to use Universes, but it is even worse. (See 
> separate e-mail)
>