Nope, sorry. This only happened to me once. Weirdest thing is that I have no firewall whatsoever so I was kinda surprised.
Did you try clicking Connect which is under the File tab (never worked for me)?
Also, it might be something with your ISP: if you told me that your connection to the net drops entirely then I would have told you that it is most surely your ISP, because I cannot stay connected a little over 24 hours since my ISP automatically shuts my connection down.

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iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

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