AP Payment Entry - Process Payment

Hello Guys,
I need some help here. There is a Customization already working generating the proper bank CSV file format. however, just after the deployment of a second Appserver ussing the Single Sign On (working as expected) the custom stop working.

in invoice entry i create a group, select the invoice, go to actions-process payments and the form is shown. right there the form is “printed” using a server printer and selecting the no printing check box at the top of te screen.

I´m running E10.0.700.4

I have confirmed and in both inetpub appserver folders the customized files are present. is there some kind of cache or something else I´m missing?