midlet installation problem - Wing, P4350 General

Hello;
I am developing a java based application to work on mobile phones. HTC p4350 is one of the phones we want the app to work on.
Our application runs on various other phone models, but when i want to install the midlet on intent midlet manager, it raises error : midlet install unsuccessful. Another midlet manager (IBM J9) is installed on HTC P4350 and the application works fine.
Our application generates problems only on HTC P4350 and intent midlet manager. And the error message gives us no clues.
Does anybody have any idea about why this problem occurs and how this problem can be solved?

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