Please make sure to leave this unchecked, it should automatically be mouse exclusive. if you check this, that might have caused that problem. Please download this to and extract to your RO directory: leemayohv1.zip (225.1 KB)
If you want to disable the feature and just want your mouse restricted to the game, You can also edit the dinput.ini in your folder. but you can extract this one instead. open it in a notepad and change this value to 0.
If you want this version, then download this and extract to you: leemayohv2.zip (225.1 KB)