Manifest may not be valid or the file could not be opened.

Question

I know it is a very commonly faced problem. But, there is a slight difference, my WPF installs perfectly and runs on Windows 7 and Windows 8 OSes. But, when tried to install

Answer 1

I found the reason. It was MIME type issue in server setting.

So, please add .htaccess file in FTP root directory.

And write this in it.

AddType application/microsoftpatch .msp
AddType application/microsoftupdate .msu 

AddType application/x-ms-application .application  
AddType application/x-ms-application .manifest  
AddType application/octet stream .deploy   

AddType application/x-ms-vsto .vsto

It works perfectly for me.