My Ps3 Wont Play Ps2 Games After Downloading the Add on for It?

I downloaded the add on to play ps2 games but when i put it in it says something like unknown disc with the image as a question mark with a circle around it?

please help!

Suggestion:

the 40GB PS3 NEVER played PS2 games!!! quit telling people that it does!!!!!!!!!!!!!!!!!

backward compatibility for the PS3 with PS2 games is as follows on NTSC systems:

20GB (4 USB slots, fat, no longer in production) – YES
60GB (4 USB slots, fat, no longer in production) – YES
80GB with 4 USB slots (fat, no longer in production, bundled with MGS4 or Motor Storm) – YES
40GB (2 USB slots, fat, no longer in production) – NO
80GB with 2 USB slots (fat, no longer in production) – NO
160GB (2 USB slots, fat, no longer in production) – NO
120GB/slim (2 USB slots) – NO
250GB/slim (2 USB slots) – NO
any other up coming PS3's – NO

PAL systems only have one backwards compatible system, and that's the 60GB.

THAT'S 4 SYSTEMS THAT ARE IN FACT COMPATIBLE WITH PS2 GAMES!!! NOT 1 SYSTEM, NOT 2, 4!!!

in short: if it has 4 USB slots, yes. if it has 2 USB slots, no.

and as you can see, there are 3 systems that are fat, but can NOT play PS2 games. just because the system is fat does NOT mean it can play PS2 games.

ALL PS3s play PS1 games.

http://en.wikipedia.org/wiki/PlayStation_3#Model_comparison

the download that others are referring to is for the PS3s that already are backwards compatible. downloading it to a non-backwards compatible PS3 will do NOTHING but take up space on your hard drive! it will NOT make your PS3 play PS2 games!!!

"If a PLAYSTATION 3 is not backward compatible, you will not be able to add this function through any hardware (i.e., changing the hard disk drive) or software (i.e., updates, homebrew) upgrades or modifications. "
that came DIRECTLY from Sony's own website: http://playstation.custhelp.com/cgi-bin/playstation.cfg/php/enduser/std_adp.php?p_faqid=232&p_sid=1P9bCDwj

I dare anyone to steal my answer again. this is MY answer. I took the time to type this all up. yes, every time someone asks this question, I do copy and paste. but I'm copying MY work, MY answer.