Hosting a VST as vst~ and displaying its UI from Ableton

Hi all,

I'm trying to build custom UIs for some of my VSTs in Ableton, but I want to retain the possibility to use the full plugin UI via some M4L buttons. I tried using the vst~ object to load them into Max/MSP, then added two buttons in presentation that trigger the open and wclose messages to display the UI. Unfortunately this doesn't seem to work once I've closed the Max editor, the UI opens for a brief moment then seems to get killed by Ableton. If Max is open and I click the button from Max then everything works as expected. Does Ableton prevent Max from opening new Windows by default ? Is there a workaround ?

Thanks in advance!