Asset addition accounting entry neglect the combination given in asset categories screen

Hi all,

I'm facing some problem with the accounting entries coming for the addition event type..

1st in our COA structure we have 10 segments , 2 of them are account and subaccount segment

so now we've defined subaccount for each main asset category..so in the asset categories window i will give for example

(150.111) 150 is the asset account and 111 is vehicles sub account..

when i create asset for the vehicles category i found that the system creates the addition entry with the 150 as asset account but 000 "default" as sub account

can anybody clarify me if something wrong or is it the standard functionality..and if so how can i solve this issue??!!!