I had similar troubles with my initial sync with my phone. I never tried using the online collection to sync, only my local collection. When I tried connecting via network name, I had lots of trouble connecting. Using the IP address seemed to correct the connection issue. Your IP address should be displayed on the bottom of the DVD Profiler window (if not, go to Tools > Options > Sharing). Once connected and you begin the initial sync, don't let anything interfere with the process...don't try to do anything else on the Kindle, don't let the screen turn off, nothing. Once I figured this out, after several failed syncs when I let the screen turn off, it synced fine...but it will take quite a while depending on your collection size. After you complete the somewhat lengthy initial sync, subsequent syncs should only take under a minute.

Ugh.

Frustrating. Kept the screen alive and didn't do anything else. Same results.

So I just got a tablet a mid-756, it's not fast.  But it was cheap and it works if your not in a hurry.  I also have a Samsung s3.  So a long time ago I bought the android version and put it on the s3 and everything worked fine.  But now I'm trying to install profiler on the tablet and I'm getting the same errors as the rest of the folks in this thread.  I must have tried to download from invelos DB about thirty times and it always freezes and crashes before finishing.  Sometimes it loads some data (without images and never more than half), but mostly it just freezes and then eventually crashes.  I say crashes, but all I know is when I return to look at it, it's not running the profiler app and is in the app browser.