SQL 2000 - Blocking Happening again and again

Hi  guys..

on sql 2000 ..from today morning blocking keep happening again and again even though killed SPID .. Reastarted SQL and app server. any one has idea what will be good action item?

also like to know scripts for sql 2000 gives detailed information about which query is blocking .

In sp_who2 shows IIS program name as blocking 

thanks

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