getting an error which uses 100% of CPU

I am facing huge problem when webmethod services try to do this particular action

I get these logs in Webmethod server.

2007-09-12 02:57:34 EDT [ISS.0098.0021D] Volatile Trigger Output Dispatcher started
2007-09-12 02:57:34 EDT [ISS.0098.0027D] PersistenceManager started all Stores
2007-09-12 02:57:34 EDT [ISS.0025.0036C] Dispatcher started
2007-09-12 02:57:34 EDT [ISS.0025.0005C] Port Manager started
2007-09-12 02:57:34 EDT [ISS.0025.0013C] Cache Sweeper started
2007-09-12 02:57:34 EDT [ISS.0033.0150D] The first server has joined the cluster.
2007-09-12 02:57:34 EDT [ISS.0033.0152D] The cluster is now operational.
2007-09-12 02:57:34 EDT [ISS.0033.0109D] Server phlelwmi1 added to cluster WEBM_CLUSTER_NAME
2007-09-12 02:57:35 EDT [ISS.0014.0002C] Initialization completed in 484 seconds.
2007-09-12 02:57:35 EDT [ISS.0014.0025C] Master password for outbound password encryption has expired. Password was last changed on 2006-06-04 01:01:20 EDT. The current expiration interval is 361 days
2007-09-12 02:57:35 EDT [ISS.0025.0016C] Config File Directory Saved
2007-09-12 02:57:43 EDT [ISU.0000.9999W] Error running archive operation: Couldnt delete archived documents

I would say it takes lots of memory in Database server when trying to delets or archive activity log in TN database.

Please help I am using 6.2 version of webmethod TN server.