Add-on Crashing after upgrade to SAP 8.8 PL15

Hi Experts,

I recently upgraded one of our clients to SAP 8.8 PL15 using PL15 Upgrade patch. It all went well except following:

Outlook Integration and Payments add-on keep crashing. The standard SAP Add-on crash message: Add-On Payments is disconnected. Choose from following options: Restart Add-on , Log Off Company or continue without Add-on.

This is happening on all clients and Terminal Server but not on "Application Server" itself.

I am sure i am not the only one to experience this. Please let me know how would you respolve such an issue.

Thanks in advance.

Regards

Dave