Max crash at opening, safe mode opening possible? [solved] filtergraph question

Hello,

I am working on a patch, where I use a filtergraph object.

I wanted in Presentation mode to be able to either manipulate the filtergraph or float boxes to enter Frequency, Gain, Q... I also wanted thoses three float boxes to update their value when manipulating the graphic display of filter graph...

It's much like when you use the set message on a Gain~ object to either grab the fader and so set numerical value or enter numerical value wich set the fader, with only one float boxe.

When trying to find a way to achieve this result with filtergraph (if anyone has the answer BTW, I'd be interested), I did something that looped I guess. But instead of having a simple Stack Overflow error, it did crash Max/MSP.

The big problem is that when I restart Max/MSP, and reload my project to correct it, it instantly crashes Max...
So I can't remove the fawlty connection!!!

Is there a way to open it in "safe mode", so that I can correct the trouble maker, and continue to work on that patch (instead of redoing all from scratch!)?

Thanks.