I redownloaded pathed drivers ojdbc6.jar
from OTN.
To check, whether you have pathed driver or not, follow these steps
> java -jar ojdbc6.jar
The unpatched jar prints
Oracle 11.1.0.6.0-Production JDBC 4.0 complied with JDK6
and the patched jar prints
Oracle 11.1.0.6.0-Production+ JDBC 4.0 complied with JDK6
If you use ojdbc5 it will say 3.0 and 1.5.