Help. Can't stay connected.

[Cygnus7]

I also am on a Win7 64-bit machine, and was having similar issues yesterday.
I'd log in, see the character select screen, choose a character, and get to see about half a second of the docking bay interior before FL crashed to desktop. Happened repeatedly.
I checked my ping, drivers, .NET versions, discovery and FL install, etc and all were updated/clean.
I am using MSE for antivirus, and tried adding the entire Discovery directory (and DSAce.dll) to exceptions - but that didn't help.

Next, I tried changing the discovery launcher option from fullscreen to windowed mode...
Voila, worked like charm!
My problem seemed to be connected to running FL in fullscreen. No idea why.

I don't know if this will fix anyone else's issues, but it worked for me (so far at least).