Make sure you installed everything into your
Counter-Strike folder. I used to have some problems with my old CS because some files went into an empty Half-Life folder. Sooo, make sure everything is in it's place. Try re-installing ESF.
If you have two HD's, (Hard Drives) Make sure you installed ESF into the same HD that your CS is in. I messed up before and installed ESF into my drive C:, when I really had my HL in my drive D:. ESF automatically would try and install itself into drive C:.. (For some odd reason, I have a Sierra folder in my drive C:
) So, just make sure you're doing the right things and not just rushing to install ESF.