[plt-scheme] Errors on PlaneT

Hi, I'm getting errors when I try to install DivaScheme from the PlaneT 4.x
repository on DrScheme 4.0. Any ideas on how to fix?

command: (require (planet "install.ss" ("divascheme" "divascheme.plt" 1 3)))

results:
Welcome to DrScheme, version 4.0 [3m].
Language: Module custom; memory limit: 128 megabytes.
(require (planet "install.ss" ("divascheme" "divascheme.plt" 1 3)))

Internal PLaneT error: trying to install already-installed package
setup-plt: error: during making for <planet>/dyoo/rope.plt/2/3 (rope)
setup-plt:   Internal PLaneT error: trying to install already-installed package
compile: unbound variable in module
compile: unbound variable in module
compile: unbound variable in module
setup-plt: error: during making for <planet>/divascheme/divascheme.plt/1/3
(DivaScheme)
setup-plt:   compile: unbound variable in module
setup-plt: error: during making for
<planet>/divascheme/divascheme.plt/1/3/semi-read-syntax
setup-plt:   compile: unbound variable in module
setup-plt: error: during making for <planet>/divascheme/divascheme.plt/1/3/tests
setup-plt:   compile: unbound variable in module
Internal PLaneT error: trying to install already-installed package

-When I quit and restart DrScheme I receive a bunch more errors relating to
DivaScheme.

-On a related note: is there a package uninstall for cases like this?

thanks
jeff