jasper report with oracle .

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Java

Hello,

I Want to connect jasper report to oracle database.i use ireport for design.
for connection i do all the thinks told in:
http://ireport-guide.blogspot.com/2008/04/how-to-connect-to-database-or-data.html#comment-form[^]

I done all the things that u told but i got error,

SQL problems: Io exception: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=169869568)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
jdbc:oracle:thin:@localhost:1521:EMPLOYEES

plz help me.