I can't install patch 1.07

[Maceme 0]

Hello,

this week I have purchased Arma 2 Combined Arms from Sprocket (downloadable version). I installed Arma 2 (F:\Bohemia Interactive\Arma 2), and after, Arma 2 OA (F:\Bohemia Interactive\Arma 2 Operation Arrowhead). Then I installed the patch 1.52 to 1.54. And then I tried to install the patch 1.05 to 1.07 for Arma 2, but a error message tells that Arma isn't installed. I can play both games, Arma 2 1.05, and Arma 2 OA 1.54 without problems, except that I can't play the maps, vehicles... of Arma 2 in Arma 2 OA. How can I install the patch 1.07, and how can I play the content of Arma 2 in OA?

Thanks in advance.

Edited September 9, 2010 by Maceme

[ast65 10]

Try installing ArmA2, patch it to 1.07 and then install OA and patch it to 1.54.