Problem with statisitc condition in Pricing procedures.

Hi.

I have a problem with my pricing procedure and booking it to FI.

I have pricing condition f.e. VAT.

VAT compute tax and wit booking key should be booking and it is.

But  i have another VAT pricing condition f.e VAT2 (it was created like a reference to VAT) and it should be only for compute value to another (third  condition).

This VAT2 shouldnt be booked. But when i want to book delivery i got message "no aacount". message come from VAT2.

Is there a reference problem and how can i fix it ?

I make VAT2 like a referenc to copy all neccessary configuration.

I dont want only to bookd this condition

Thank You

Serghi.