Dreamweaver help please =)

I recently installed the Comodo Firewall - very impressed, but it’s giving me trouble with Dreamweaver and/or FTP. The Dreamweaver FTP software is connecting fine with my site, but any files are written as 0KB blanks. I’ve tried giving Dreamweaver about every right possible, but this still seems to be happening. I did a search for Dreamweaver topics, but could only find people having trouble connecting with their FTP servers full-stop, not with it connecting but refusing to write any data (well, it’s actually overwriting files with these 0KB things).