Problem with file checksum error file corrupt

http://www.pindiy.com/forum.php? ... t=Enchanting%2BLair

I download this but part 1 and 3 will not open I keep getting a checksum error , the archive is corrupt.  Did anyone else have this problem and how do i fix it, if it can be fixed.

Turquoise

Please next time report here :
http://www.pindiy.com/thread-217867-1-1.html?_dsign=9f2c2882