TWO-TASK SERVER: error = 12571 & ORA-3113

[daljitsb]

Oracle 8.1.7 on Windows 2000 server

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I am getting
TWO-TASK SERVER: error = 12571
(Ungraceful disconnection of a session from the oracle db while the db is currently running a dml statement issued by that session)

&
***Got ORA-3113 while running PLSQL***
PROCEDURE TRACKER.WEEKLY_DIARY_REPORT_NEW:
(end-of-file on communication channel)

errors every 10-15 days.
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Q. First of all are these 2 errors somehow connected.
Q. Is error ORA-03313 is being caused solely because of PROCEDURE TRACKER.WEEKLY_DIARY_REPORT_NEW.
Q. Whats the resolution to get rid of both. The above errors does not crash the DB (haven't caused it yet) but causes the system to slowdown - that procedure uses 98% of CPU when its running (no other process works until the procedure is finished executing).

Any help is much appreciated. Thanks

-D