Unable to open CAB file on Nokia

[EnZed]

Hi,
I'm attempting to install SyncML Client for Windows Mobile SmartPhone v3.0.2.22 to work with Nokia N80 (Symbian OS) and DeskNow mail.

Having installed the syncpro_en.smp.cab file onto the Nokia, I'm getting an "Unable to open file" error when I try and run it.

I think I have the correct file type in that the manual acknowledges symbian os smartphones.

Any help appreciated.

cheers.