MIDP applications web access

Hello,

I developed MIDP application which need internet access suing http protocol. The application is a client for a web service.
The application run perfectly on the emulator but it does not work on my mobile phone although my phone has internet access and I can browse the web  without any problem.
How can I tell the application about the settings of internet access??

Thanks in advance,

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Motaz K. Saad