There was a movie, where this woman is lost in the jungle with amnesia. Two guys are looking for her?

My husband is driving me mad trying to figure out some movie. Okay this is what I have so far. There is a woman lost in the jungle with some type of memory loss. Two guys are trying to find her, one that is really clumsy and wrecks a jeep. At the end, they are bandaged and standing atop a waterfall. He said it might have been made in the 80s or early 90s. Sorry I dont have much more to go on, but I really must find this. ThanksThere was a movie, where this woman is lost in the jungle with amnesia. Two guys are looking for her?
"Pure Luck" with Danny Glover and Martin Short http://www.imdb.com/title/tt0102729/

heres the trailer http://www.youtube.com/watch?v=y4H0W-Vuw鈥?/a>

The daughter of a wealthy bussinessman has dissapeared in Mexico, and all the efforts to find her have been unsuccessful. A psycologist, knowing that the girl has an ultra bad luck, persuades her father to send to Mexico one of his employees, an accountant with super bad luck, to find her. Perhaps he will be lucky, and his bad luck could help to find the unlucky girl...