NWN 1.62 patch don't work?

[MaGicBush]

Well, I have the most recent version of NWN and SoU. I found that patch by Dexity for 1.62 and it doesn't work, I also have the 2 files in the NWN main folder. I double-click on the NwN_NoCD_patch.com file and push y then it shows this message,

"I/O Error. Patch have NOT been applyed"

What's that and why wont it work? I am not the only one with this problem, as over on the Megagames forums a few people asked about this a while back, but was never answered. Thanks for any help!