VMware Fusion 2.x not running with 64 Bit Kernel Lion
Upgrade to VMWare Fusion 3.1 which is compatible with Lion, with limited support from VMWare.

VMWare's knowledge base says


  VMware Fusion 3.1.3 was designed for OS X 10.5 (Leopard) and OS X 10.6
  (Snow Leopard). It is compatible with Mac OS X 10.7 (Lion), with the
  limitations listed below.
  
  If you are running an older version of VMware Fusion, upgrade to
  VMware Fusion 3.1.3 before upgrading to Lion. Fusion 2.x is
  incompatible with Lion.