WebService problem: only the first element of a string array is returned

Hello,
i did the J2EE QuickCarRental tutorial and extended it by some features: I created another entity bean and implemented four new methods in the QuickOrderProcessor. Then i deployed it as a WebService and accessed it using the Visual Composer.
Everything works fine except the return value of one WebService method. I created a method with the return value String[]. But the Visual Composer reads it as String. Only the first element of the resulting string array is displayed. Although the test at the web-page http://<server>:<port>/QuickCarRentalService/Config1 displays the whole string array with all its elements. What did i wrong?
Another problem is that after deploying the J2EE-Application with new WebService methods the changes are not visible inside the visual composer. Although the test at the web-page http://<server>:<port>/QuickCarRentalService/Config1 displays the changes. Do i have to restart the WebService system in the portal content? If yes how can i do that?

Here are details about setting up and using web services and some examples:
/people/prakash.darji/blog/2006/10/10/external-web-service-proxy-configuration-for-visual-composer

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