FTP servers use UNIX-style file paths. Furthermore, the directory-structure that you see when logged into your FTP server is not the same as that of the machine that the server is running on. For example, IIS's FTP server has an 'FTP root' directory (usually C:\Inetpub\ftproot) and all directories and files accessed through the FTP server are given relative to that directory. So for example, if you have a file whose Windows path is C:\Inetpub\ftproot\mydir\myfile.txt, then the path as seen from an FTP client would be /mydir/myfile.txt. The way that these directory structures are set up vary from one FTP server to the next.
So I don't know what server you're on, but @"C:\meUploaded.txt" definitely won't work. Try using @"/meUploaded.txt" or even just @"meUploaded.txt".
- Hans (EnterpriseDT)