SQL Developer connection issue with JDBC

Hi skutz & friends,
I have problem with Oracle SQL Developer I can not connect to any oracle db
because Status : Failure -Error loading native JDBC driver library.
However, I download SQL developer [ Oracle SQL Developer for Windows (JDK1.5.0_06 is bundled in this zip) ]
After it is not working. Also I download JDK 5.0 Update 14
The Java SE Development Kit (JDK) to install it on my PC again.
But it does not work. My install path information:
install path as C:\Program Files\SQLDEVELOPER_INSTAL\sqldeveloper
local oracle as !0g 10201
SQL version as sqldeveloper-1.2.1.3213 which download last versionfrom OTN on 2/18/2008.
for connection, taken basic.
port as default 1521
hostname and saver name are same.
I created a environment variable in window xp.
SQLDEVELOPER_USER_DIR AS C:\Program Files\SQLDEVELOPER_INSTAL\sqldeveloper
can anybody help me with this connection?
thanks
Jimmy

Duplicate thread: Please enter all responses on other thread: SQL seveloper connection issue with JDBC

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