Custom Functions Library still not work

[Service_7]

Hey all,

i try to implement my own java functions into the Jaspersoft Studio v6.0.3 like this tutorial: http://community.jaspersoft.com/wiki/jaspersoft-studio-expression-editor-how-extend-it-and-contribute-your-own-functions-part-2-0 , but i always get the following error on report-preview:

http://pastebin.com/ck1v7pFL

If i change the report language to java (i read this in another post) i get these errors:

http://pastebin.com/Z3yfcgSB

 

Thanks! :)

[Service_7]

/push

Please help me :/

I found another solution which says i should register the two files "jasperreports_messages.properties" and "jasperreports_extension.properties"..
is it right? How i can do that?!