unable to see the blog file extensions

Hi,
              i am redeploying jblosm and now unable to see
the column blog
file extensions and preview tab  in the weblog setting ->
edit blog
propeties.attached is the screen shot.i think we need to set
it somewhere
in the server.please helop!!!!!
Thanks And Regards,

Lakshmi Suryakrishna,
Starcut Asia Pacific Pte Ltd,
3,International Business Park,
03-01,Nordic European Centre,
Singapore 609927

"A man is not finished when he's defeated; he's
finished when he quits."







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