Certificate doesn't work !!! Is this because ....

Hi!
On a windows 2003 server SP2, i buy a certificate for an HTTPS access..
I have create the certificate request with IIS wizard, and send my request
to my certificate provider... during the time i wait to have the
certificate, i have put a "local home-made certificate" that i have done
with the certificate service..that works fine.... when i finally have my
real certificate, i delete the current certificate end import the good
one... import works fine but the web site with https does not work, i have
the generic error for a page that could be found...why ?
Is it because i release the request in IIS when i put my local certificate
???
IIS does not give me error when i import the certificate.....
Shoule i have to re-make the certificate request and wait the good
certificate to import it ?

Thanks for answering me ...

OK !

OK !
I solve the trouble by using certutil and repair the certificate with the
Thumbprint .... before re-install it on my web server !
thanks !