Problem - some networking classes not supported by my MIDP device???

I have a MIDlet I developed which uses java.io.* and javax.microediton.* packages. The MIDlet reads http data and displays it (pretty simple). In fact, it uses some of the sample code from this site.
Runs fine on the emulator, but when loading into the phone (Motorola) the java app loader blows up with this error:
"The selected application cannot be loaded because it contains networking classes or packages that are not allowed.".
Why am I getting this? Shouldn't all MIDP-compliant devices support the packages I'm using?
I checked the jar, there aren't any other files in there that shouldn't be.

It is the JAL - it only supports non-network app downloads. See my other post in this group for downloading network apps.

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