hi, sorry but i dont know that there is much we can do to help. this sound like a flash builder bug. these forums are for the open source flexunit project. the execute flexunit stuff inside builder was implemented by the flash builder team and is not part of the project nor maintained outside of adobe engineering. i would file a bug at bugs.adobe.com and post the bug number here. i can try to get some attention drawn to it, but we dont even have access to that source
mike