well, what kind of attachments are they? Are you trying to launch them or detach them? Typically, files transferred from a Mac to a PC don't show the appropriate extension, so launching won't work because Windows won't know what kind of file it is. Figure out what the file extension really should be and add the extension when you detach the file. Then try to open it.
Or, detach the file without an extension, and then open whatever program you plan to use to view the file first, then select the file and open it. [sig][/sig]