Do the disks play correctly in the LG drive in your computer? You'll need software to do this, such as PowerDVD or the vastly superior Arcsoft TotalMedia Theater 5. There are trials for both if you do not have either.
If they play on the computer without issues, then you have a compatibility problem with the Samsung player. There is a firmware update for the BD-P1400 dated April 7, 2011, available for download from Samsung's US site. You should burn it to a cd and update the Samsung if you haven't already done so. http://www.samsung.com/us/support/downloads/BD-P1400