On Feb 16, 2008, at 22:53, Angela Zhu wrote:

> Well, I think now I don't have any dependence problems, but
> encountered another error:
>
> ------------------------------------------
> $ sudo port install lablgtk2
> --->  Activating lablgtk2 2.10.0_0
> Error: Target org.macports.activate returned: Image error: Another
> version of this port (lablgtk2 @2.6.0_0) is already active.
> Error: Status 1 encountered during processing.
> ------------------------------------------

You need to deactivate the old version first:

sudo port deactivate lablgtk2 @2.6.0_0