Um. Version 1.1 is an installer, not patch.
You should run it to INSTALL Tsukihime.
Uninstall Tsukihime from your computer, then:
Keep your Tsukihime CD in the drive, and then run the Ver 1.1 patch. This way you install the game from scratch with English translation, as opposed to installing English OVER Japanese version. It should be working after that (Ver1.0 is the same thing)
And here is a link for Kagetsu Tohya's patch v0.5.2 (latest), as taken from KT's translation thread over at Beast's Lair:
http://rapidshare.com/files/52236223/Ka ... up.exe.htm