What you need to do is to to add this section to the apis.xml in the root folder of J2ME-Polish.
This is needed so J2ME-Polish nows what api:s you are using, and as you did they also need to be in the imoport diretory of J2ME-Polish.
<description>Enable read/write from RFID-tags
<name>NFC Client Integration API</name>
<description>NFC Client Integration
I've had the exact same problem both with eclipse and intelliJ and this fixed the build process for me when building with an ant-script.
Best Regards Johan