postgresql-postGIS problem detected in pgadmin

I am using pgadminIII 1.8.4  (tar.gz -built from source) , postgresql 8.3.4(rpm from default packages repo) and postgis (postgis-1.3.3-4.fc10.i386.rpm) (installed using fedora10 rpm -i / -ivh command) . These 3 have been installed successfully.

But to my horror , when I trying to create a new database , UTF8, using postGIS template in pgadmin , the option is not even there in the template's dropdown list . Which I am suspecting a faulty postGIS installation . Prior to installing the postgis rpm version, I tried many times to install from source but to no avail with error message ' PostgreSQL is required' when POstgreSQL is already installed months before ....