Can't install - Windows installer problem on Vista 64-bit

I have a similar problem as in this thread: ... 912&hl=msi

My Microsoft Installer (MSI) service seems to also have a problem. The solution posted does not work for me, as the "SFTPNSI.exe" only works with 32-bit Vista.

My Question: is there a 64-bit Version of the SFTPNSI.exe?? Or any other way to install SmartFTP without using the MSI service? I mangaged to install all other software on my PC without problems, only SmartfTP is causing this problem. I have a license key and would be very disappointed if I had to look for another FTP program..

Please help!