How Link the trip advance to a specific GL account

Dear all

I have been able to maintaint many tables(T030, T706K, etc.) for the PR05 transaction and have defined the link between trip activity types and derived GL accounts.

But when I put an advance in the trip request and go to PRRW for the posting run, the GL account is not the expected one but.

If any of you have an idea, I will really appreciate advice.