insert new key filter in cbox2
 

In this form i have insert a filtre in cbox1 for column M of sheet this
is the first key.
Have difficult to insert the second key of filter in cbox2 about column
E

help !!!!!

Naturally if you have other way are welcome for filtre on the 2 cbox.
Tks.
here the file:
http://www.mytempdir.com/1098501