install problems with xampp download

[tom king]

have tried chmod 666 664 and 755 which your download instructions say to use ...I do have x64 intel chip but the version of ubuntu 12.04.03 is the 32 bit version ...can anyone tell me what to do, plz
tnx --tom

Below is what I get in terminal:

xampp-linux-x64-1.8.3-2-installer.run
root@tom:/home/tom/Downloads# chmod 755 xampp-linux-x64-1.8.3-2-installer.run
root@tom:/home/tom/Downloads# ./xampp-linux-x64-1.8.3-2-installer.run
bash: ./xampp-linux-x64-1.8.3-2-installer.run: cannot execute binary file (emphasis added)
root@tom:/home/tom/Downloads#