Mhs's Not attaching to Engine.exe

I get a problem while trying to attach Cheat Engine to Engine.exe.
It just says there was an error
Also i tried with L spiro's Mhs, same error
Someone help?

GudSoldier's edit: If you have vista you should right click any hack and run it as administrator. Why? Because it lets the hack have the access it needs to hack.
If not, make sure your using the bypass properly.

you haveto have the game started first, then alt+tab out then attach mhs/ce to it.

or just go to file->open recent