I can find my device fine, but after clicking "get data" I get a "object not found" error. I just got the 405 a couple weeks ago and always get this error.
Tough to say without more information. This is a mixture of Garmin code with our own so the first thing is to determine on what side of the fence the error is coming from.
Can you post a screenshot of the message? That could help me determine if the error is coming from Garmin code or ours.