Unable to make filters work

["=?utf-8?B?4KSG4KSy4KWL4KSVIOCkleClgeCkruCkvuCksA==?=" <alok_kumar softhome net>]

Hi list,
Newbie here. I'm not able to make filters work in Balsa(2.0.11). I 
tried adding filters via Edit -> Filters and also used Mailbox -> Apply 
Filters after that. But the filters are never executed. I have used 
both the option, ie on receipt of mail and on exit. 
What more needs to be done?
Regards
Alok

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