vst~ open message arguments

I'm opening a VST editing window (sending the open message to the vst~ object) and having trouble using the two optional integer arguments to specify its location (left and top coordinates).

I'm currently sending a bang to a message box connected to the vst~ inlet. When that message box holds...

open 1 1

with no quotes, the window opens but the following warning is printed in the Max window: * warning: vst~: extra arguments for message "open"

Is there a special way I need to package the message before sending it to the vst~? I've tried adding quotes, but that didn't help.

Thanks