Data Conversion

Hello, Need some quick help... I have an XP-machine with Oracle 10g, both EE and XE installed as standard "starter databases" with the Installers. Now I wanted to turn on sql-net tracing/logging, so I created two directories C:\oracle\log and C:\oraclexe\log and added the lines below to %ORACLE_HOME%\NETWORK\ADMIN\sq lnet.ora