cannot install draftsight v1r3.1 on ubuntu 12.04lts 64-bit

Hi,

I ran the debian version of draftsight dassault-systemes-draftsight 2012.5.53 for some time but it won;t run anymore complaining that "This product is not licensed or has expired.".

 

I then tried to install the newer version dassault-systemes-draftsight 2013.1.56 through the ubuntu software centre but it wont install because of "cannot install 'libdirectfb-extra:i386'".

 

Could you provide some help ?

 

Many thanks.