after using 1.4.0 on kubuntu feisty 64-bit for a longer time, i'm now facing this problem>
![Image](http://img457.imageshack.us/img457/6420/snapshot1ua7.th.png)
both xp and vista guest are inaccessible and their buttons are greyed out, because of similar errors stated on screenshot. I've installed guests from cd/dvd images and since then, i moved the cd/dvd instalation images to another location with no problem. where can I begin to search for problem? i've got a few nice snapshots of these OS's, and I can't afford to lose them...