How to configure PP business account for VM 1.1.9

[filmfarci]

My VM 1.1.9 (joomla 1.5.25) runs well with a PP premier account with default settings.

But when i change the 'PayPal payment email' in the api to the adress of a PP business account, the orders stay 'pending' in VM, allthough the payment is done at PP.

This business account receives payments from 2 websites... my website and another online shop.
With VM 1.1.8 things were working fine.
but since update 1.1.9  this problem occurs.

How should i configure the PP business account to get it working again? 

[filmfarci]

Anyone?