Oracle queries with a TimeStamp in the WHERE clause are failing if multiple TimeStamps are used in "AND", "OR', and "IN" situations

The following queries are failing in CTC with an ORCL errors "invalid characters" or "missing right parenthesis". The ojdbc6 driver is being used. Oracle10 VDB attached.

SELECT BQT1.SmallA.IntKey FROM BQT1.SmallA WHERE BQT1.SmallA.TimeStampValue IN (convert('2000-01-01 00:00:12.0', timestamp), convert('2000-01-01 00:00:45.0', timestamp)) ORDER BY IntKey
SELECT BQT1.SmallA.IntKey FROM BQT1.SmallA WHERE BQT1.SmallA.TimestampValue > '2000-01-01 00:00:25.0' AND BQT1.SmallA.TimeStampValue < '2000-01-01 00:00:30.0' ORDER BY IntKey
SELECT IntKey, TimestampValue FROM BQT1.SmallA WHERE TimestampValue > '2000-01-01 00:00:47.0' OR TimestampValue < '2000-01-01 00:00:02.0' ORDER BY IntKey