USB Serial Can`t open COM9: port - General Questions and Answers

Hellow
I have big problem with my application in evc++.
I connect PDA with PC via USB (PDA Client - PC Host)
My application can`t open COM9: assigned to serial USB ;( but when I open first wceusbsh001: on PC then PDA can open corectly.
Maybe CreateFile('\\wceusbsh001:'.... activate com9: on PDA?
Why programaticly simulate this operation on PDA?
Additional: When I open wceusbsh001 and next close them, COM9: is open correctly.
I have two PDA with this problem exist but I have PDA without this problem (COM9: open corectly)
Best Regards
Rafal

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_________________________
>> Smartphone software <<
1. tried on 3 PC-s
2. -
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http://docs.sun.com/source/817-3951-12/appA.html#13540

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