It's probably the wrong patch, I'm not even certain that there is a 1.0.631 to 1.8.25.003 patch, but I could be wrong.
I had similar problems earlier whilst patching, but managed by running the following three;
Sims3_1.6.6.002002_from_1.0.631.00002.exe
Sims3_1.7.9.002002_from_1.6.6.002002.exe
Sims3_1.8.25.003002_from_1.7.9.002002.exe
(Then WA and update to 2.3.33)
You need to uninstall, then run a registry cleaner, CCleaner is a good, free program.
Do not alter any game files until you have reinstalled and patched to 1.8, then run Delphy's Framework Installer tool.
Finally, install AM or a NO/DVD exe, then start the game.
Look here for patches;
http://www.simprograms.com/the-sims-3-patches/patches-the-sims-3/But read carefully what they do, ie "Patch v1.8.25", "This patch will update your game from 1.7.9 to version 1.8.25".
Always back up original files before overwriting them with a NO/DVD. When you need to patch; replace the originals and the game should recognise the correct files.