Cannot sync iPhone and osx application

First I had the 'negative priority issue'; the sync would crash when finished, and when restarting the app,
no tasks were shown.

I corrected one task with a negative priority, and now the sync never finishes. The iPhone loses Wifi signal
somehow and the sync stops somewhere halfway. The iPhone never loses the 3 bar Wifi signal with other use.

Sounds familiar to anyone? I have some 150 tasks in my database.

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