Acquisition tax group cannot be used this way

Dear Experts,

I'm trying to generate a Journal Entry using SBO 2007 SP01 using 2 accounts.

When I click on create boutton I get the following error message:

DSC1 - The acquisition tax group cannot be used this way for this transaction - Message 200-48.

Could you please tell me whu do I get this error and cannot create the JE?

Thanks a lot for your help.

Kind regards,

Walid.