Cant Install Moschip 9835 Pci In Vista I Have A Nokia E65 Running On Symbian S60 3rd Edition. I Cant Install Softwares Which I Had Downloaded..?

I Have a Nokia E65 running on Symbian s60 3rd edition. i cant install softwares which i had downloaded..? - cant install moschip 9835 pci in vista

I have a Nokia E65 runs on Symbian S60 3rd Edition. I can not install programs that have downloaded .. displays an error message "certificate error, please contact the manufacturer," and what happens ... and how can I fix it?