All your directories should have permission mode 755, as should all your executable CGI scripts. Ordinary HTML files can have permission mode 644. 

In WS_FTP: right click on the file and choose "FTP commands", then "SITE". Type in: 
chmod 644 filename.html 
and press OK. 

In CuteFTP: right click on the file and choose "Change File Attributes". In the manual section type 755 and press OK. 

In Fetch: click on the file; choose "Remote", "Set Permissions"; for Owner, tick all three boxes; for Everyone, tick Read and Search/Execute; press OK. 

In Anarchie: click on the file; choose "FTP", "Send FTP Command"; type in
site chmod 644 filename.html
and press OK.