I increased disk capacity on an expanding disk from 32 to 54 GB on version 4.0.3540 for Mac. Guest operating system is WinXP. Now I get "Non-System disk or disk error / Replace and press any key when ready" when trying to boot. I can view the contents of the disk with Parallels Explorer, so it seems like the data is still there. Any ideas? I naturally didn't make a backup, so not sure what I can do to get things up and running again. Please help!