"The Hangover Part II" and "cowboys & aliens" on blu-ray will be released on Dec 6th, 2011. But Ideal Blu-ray Copy has already got key to remove the copy protections in them, you may copy the two blu-ray to your hard drive or burn to blank blu-ray to protect the original discs being scratched or damaged.
Download Ideal Blu-ray Copy from http://www.idealdvdcopy.com/bluray-copy.htm and install it, then have a try. If you still failed to copy them, just click the icon on the left top corner of Ideal Blu-ray Copy main form, click "Export log file" menu, send the exported .gz file to their support team , they'll analyze it and help you as soon as possible.
BTW, If you want to backup the DVD editions of the two blurays, you should use their DVD Copy software, and you may download it from http://www.idealdvdcopy.com/dvd-copy.htm .