Pricing procedure condition not retaining amount

Hi experts,

I try to set up a condition in pricing procedure, which would be used in Purchase order, which should retain 50% of the asset purchase amount in a capitalization provision ledger. 50% amount would be used in the subsequent year.

issue here is, it deducts 50% from and shows in conditions tab, but while doing MIRO, the whole amount is debited to the Plant acquisition ledger, which should be as below.

Plant acquisition 50% -- Debit

Provision for capitalization 50% -- Debit

          Vendor 100% -- Credit

But what I'm getting is

Plant acquisition 100% -- Debit

          Vendor 100% -- Credit

Please let me know where I'm missing the steps

Thanks,

Anandh