URL with navurl AND DynamicParameter TOO

Hello everybody;

I have this URL https://www.orbitel.com.co/irj/go/km/docs/documents/orbitel_portal/us/personas/homeplanesus.htm?gad=cinrvskdegj9kov-8zk-khjpnzr9aycjwc8k, it has the parameter “gad” and everything is ok. But when I add a parameter to the same URL “navurl”, the webPage can not to take de parameter "gad" (I dont know why!) (https://www.orbitel.com.co/irj/portal/anonymous?guest_user=anonimo_usa&navigationtarget=navurl://927751537e890e79b9547a54a8ee4f51&DynamicParameter=gad%3DCIW3vskDEgiDnDqOo2HBtxjPnZr9AyDxtM8k). Somebody knows, how can I have "gad" and "navurl" parameteres in the same URL?

.::: Thank u very much if you can help me!!!