problem with date Output filter

ok i am trying to output the published date of resource. If i use [[*publishedon]] i get 2010-02-02 06:26:00 which is what I would expect the problem arises when I try to use the date output filter as follows

[[*publishedon:date=`%a, %d %b %Y %T GMT`]] I would expect this to be displayed as follows

Tue, 2 Feb 2010 06:26:30 GMT

but I am getting Wed, 31 Dec 1969 18:33:30 GMT.

I am using MODx Revolution 2.0.0-rc-1 rev6285

Any help of this would be appreciated

Use:

Thanks a lot I knew it must be something simple i’d missed spent close to 3 hours trying to sort that one.