Error in Asset Purchase Order

Hi,

We are in SRM 7.01, EHP1. I created a shopping cart with asset account assignment. Shopping cart created without any problem. When i am creating PO against shopping cart in sourcing cockpit or with source of supply in shopping cart i am getting the following error.

Line 1: Enter another transaction type (Transaction typedoes not exist)

Line 1: Error in account assignment for item 1

And i am not able to create the purchase order. I am able to create the purchase order with all other account assignments for example: WBS, cost center, Order .

Please advise where i am doing mistake.

(N. Kiran Kumar)