Error installing developer's toolkit

When trying to install the Developer’s Toolkit, I’m receiving the following error message after completing 37% of the installation:- COMPONENT TRANSFER ERROR COMPONENT: FBK FILE GROUP: FBK FILE: D:\upgrade tools\navision developers toolkit\ ERROR: INCORRECT FUNCTION Can anyone shed any light as to what the problem may be, any help is much appreciated - thanks.

It’s ok guys, it’s a corrupt file on the cd, I downloaded the latest version and it installed fine.