Problem in SAP netweaver Developer Tool

Hi Guys,
  I've created a session bean and and an entity bean in the
SAP Netweaver Developer Studio.
when i try  to make it webservice(session bean) as u know that we need to select which methods are appear as webservices, but all the methods are disabled.i'm unable to select them. i dont know why.
plz help me i'm working out with this problem.
  if anybody knows this plz respond quickly.........thanks in advance.
with regards,
santh

Hurray! Guys............
  my collegue have found the solution for that problem.
   create a  new workspace and copy the  folders(programs)into new one.
then check.............it'll work sure.
with regards,
santh

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