Informix JDBC driver missing 2 classes in jar file

Can someone on this site tell me what this is all about? When I try and connect to the database via an applet, I get these 4 file not found exceptions... We installed the Informix JDBC driver and I could not locate these 2 class files anywhere from within the JDBC package. Funny thing is that these exceptions don't seem to break anything as everything works just fine. I can connect and select data. It's just disturbing to see these 2 files... Anyone know what they are all about? thanks, Theron Kousek init_DbConnection, url = [jdbc:informix-sqli://mycomp.com:30000/mydb:INFORMIXSERVER=dbmydb;user=me;pa ssword=meme] java.io.FileNotFoundException: mycomp.com:80//dt/tmp/com/informix/msg/xopen_en_US.class java.io.FileNotFoundException: mycomp.com:80//dt/tmp/com/informix/msg/xopen_en.class java.io.FileNotFoundException: mycomp.com:80//dt/tmp/com/informix/msg/xopen_en_US.class java.io.FileNotFoundException: mycomp.com:80//dt/tmp/com/informix/msg/xopen_en.class DBConnection Established and working.. Best regards, Theron Kousek