error on using loadjava utility

Hi , i tried to execute the loadjava utility on a Oracle 9i database to add a .jar and I got that error. Could somebody hellp me
Here is my command : loadjava -u scott/tiger@instance as sysdba -v -resolve iText-2.1.3.jar

Result :

Error while opening file: as
Exception java.io.FileNotFoundException: as
creating : as
Error while opening file: sysdba
Exception java.io.FileNotFoundException: sysdba
creating : sysdba
creating : resource META-INF/MANIFEST.MF
loading : resource META-INF/MANIFEST.MF
JNI panic: JNI received a null array
at oracle.jdbc.oci8.OCIDBAccess.blobWrite(Compiled Code)
at oracle.jdbc.oci8.OCIDBAccess.lobWrite(Compiled Code)
at oracle.sql.LobDBAccessImpl.putBytes(Compiled Code)