error perplexing muster web part

i only wrote new web biased i am removing blunder i try muster non-dev servers:

the default namespace
''
indifferent namespace bottom web
biased propertiees. tradition web part
properties need unparalleled namespace
(specified by an
xmlelementattribute ability ,
an xmlrootattribute class).

i am minute web tools cab files deploying this:

stsadm -o addwppack -filename web_part_name.cab -url http://your_url_here -globalinstall -force 

everything works glorious until i try supplement web part, following i blunder popup. works only glorious dev vm...?

any ideas appreciate, conclude you.