JDBC-IE5-no suitable driver

running Microsoft's IE 5 ends in trouble when I start an applet that
should
display the result of a database access via jdbc under postgresql 6.4.2.
Although the jdbc-driver seems to be successfully loaded because
the initial try-block
try { Class.forName("postgresql.Driver"); }
catch(Exception e) { ... }
throws no exception or error message
the following try-block
try {
Vector results = new Vector();
Connection con = DriverManager.getConnection(url, user,
passwd);
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
....
}
catch(SQLException ex)
{
System.out.println("SQLException: " + ex.getMessage());
}
throws a SQLException and reports:

"SQLException: no suitable driver"

running Netscapes Navigator, the same applet displays the result of the
database query via jdbc under postgresql 6.4.2 without any exception or
error.

thanks

Christoph Fister
fister(at)uni-muenster(dot)de