SAP IDOC Invoicing Party

Dear All,

I want to change my invoicing party from Eur0004 to Eur0002. I have go to user exit program and change the vendor code inside the program (means minor change). I reaactivate it back as well. When i create the IDOC all phase until last phase when it is auto Invoice Receipt it is still go to vendor Eur0004. Is it i miss anything place that need to reconfigure? thanks in advance