Ok, I have an Ext1 working just fine but now I need Ext0 doing exactly the same as Ext1...
It doesn't (making contact with the pin to ground for an instant should be enough...but no interrupt occurs when I do)

I call Ext1 like this:
_interrupt(2) _using(2) void Meet(void)

and Ext0 like this:
_interrupt(0) _using(0) void Meetother(void)

I activate the Ext0 exactly the same way as Ext1 and the port config is for that pin (P1_3) exactly the same as for P1_4 (I don't even think that it matters).

Are there any problems I didn't think about?