I have an older Win32 app that uses FTP to upload some data to a server from time to time. This app works great in Windows XP and has been working fine in Windows 7 and Vista. For some reason, when running under Windows 8 it has trouble uploading its data. It appears to connect and upload the data OK but it has times out when disconnecting. The data does not appear on the server. I have limited visibility into the app while it's running so sorry for the vague nature of the description.
My question is: Is there some security setting in Windows 8 that would keep this app from using FTP? When I check the settings it looks to me like I have it set up to prompt me about any permissions problems it might have, and I'm not seeing any prompts.
I've tried running this app in XP/SP3 compatibility mode with no luck.
At this point I'm just looking for some clues as to where to look.