Have you checked the actual, physical connection?
My PDA once did that and it was a matter of the cabling not being secure. Go figure.
Of course, if you sync up yours via infrared, then disregard this and go look for MM or Kirk...
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Current Benzes
1989 300TE "Alice"
1990 300CE "Sam Spade"
1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007)
1998 E320 "Orson"
2002 C320 Wagon "Molly Fox"
Res non semper sunt quae esse videntur
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Not in this weather!