[OHM] Uploading data using JOSM

[Warin]

Hi,

Before I remove data from OSM that is historic (but no loner on the 
ground) I would like to up load it to OHM.

I have set the connection to http://www.openhistoricalmap.org/api/ as on 
the OHMwiki page 
http://wiki.openstreetmap.org/wiki/Open_Historical_Map#Editing_OHM

Then when I try to upload I get "Uploading to 
'http://www.openhistoricalmap.org/api/0.6/' "

Clicking through that gets an error message

"Failed to upload to or download data from'http://www.openhistoricalmap.org/api/0.6/'

details (untranslated):null "

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Note the 0.6 does not appear in my connection preference yet that looks 
to be what JOSM is using.