[Evolution] clicking on link not launching browser...

[simran]

Hi All, 

I am using Evo ver: 1.4.6

When i receive an email with a link in it... clicking on the link, does
not launch the browser.... however, clicking on it, produces the
following warning in the .xsession-errors file:

=======================================================================
(evolution:20350): evolution-mail-WARNING **: gnome_url_show: There was
an error launching the default action command associated with this
location.
=======================================================================

Could anyone please advise on how this might be fixed.. 

thanks,

simran.