QextSerialEnumerator::getPorts() links fine, but can't run

Hi, I have tried to compile and link qextserialport.dll into my app, it builds ok. But when I run it, I get "exited with code -1073741515".

I am running under Windows XP.

The program most likely can't find a required DLL

Thank you so much, I have copied the "qextserialport.dll" to my build directory, it works!