Steema Central

I'm running TChart Pro version 6 on Borland Builder 5 Enterprise. I'm having difficulty with Add and Subtract working. I've got one function that divides two series just fine, and I've got a function that does the Subtract just fine, but on another function with a different set of series (all of the above are FastLines), it does not work.

Could some please briefly outline the steps to do here? Or are there any know problems with the Add/Subtract functions?

Thanks