problem with copy ctrl from quotation to value contract

Hello,

We need to define a contract process starting with quotation and flow to contract-order.....

We use both quantity contract and value contract. I defined a quotation type (ctg B) and copy control to contracts.

The copy ctrl. for qty contract is working good, but when it is copied to value ctrct. I get the error message "Only quantity 1 PC is allowed" (msg no. V1524)

I beleive it because of coping qty from quotation to value field of contract...

Is there any way to define this for coying to right places?

Thanks for your reply and help,

Fariba