ActiveX bug when loading AS2 after AS3?

We’re developing a VB.net application that has a Flash ActiveX control. It loads AS2 swf’s and AS3 swf’s… but after you load a AS3 swf, when you load a AS2 swf file into it, strange things start to happen… Tweens fail to animate mc’s, and text input controls show as grey boxes.

Any idea on what’s going on?