WDA Unresponsive UI after popup call

Hi Experts,

I've built a working application with mutliple confirmation boxes & search helps in our development system client 100.

When I launch the application in our test client (300) the popups are not displayed & the screen becomes unresponsive.

I've debugged the application, and all code executes including the standard event loop without any errors.

Any ideas?

Cheers

Sam Hardman