php + oracle

hello,

i tried to connect php +oracle, but i could not.
i followed instructions of this site

but, when i try test file i got

Fatal error: Call to undefined function OCILogon()

error. i searched on google, what i find is to check my extendion_dir and uncomment

extension = php_oci8.dll
extension = php_oracle.dll

yes, i have done these several times.
but i could not connect to oracle.
what can be problem ?

thnx.

ok i solved the problem.

php-5.1.4 is not supperted with oracle 9i
so, i installed php-5.0.1
and it worked.