How do you configure Wildcard SSL on Apache a single IP?

Question

I have recently purchased a Wildcard SSL Certificate for my domain, however I am having difficulty configuring it within Apache. My server has one dedicated IP address, so I have read that you need to reference the IP address in the Virtualhost. My config looks like this:

<VirtualHost 172.16.0.3:443>
 ServerName appstore.mydomain.org.uk
 DocumentRoot /home/appstore/public_html
 <Directory "/home/appstore/public_html">
     allow from all
     Options +Indexes
 </Directory>
 SSLEngine on
 SSLCertificateFile /home/appstore/certs/mydomain.org.uk.crt
 SSLCertificateKeyFile /home/appstore/certs/mydomain.org.uk.key
 SSLCertificateChainFile /home/appstore/certs/gs_intermediate_ca.crt
</VirtualHost>

<VirtualHost 172.16.0.3:443>
 ServerName blog.mydomain.org.uk
 DocumentRoot /home/blog/public_html
 <Directory "/home/blog/public_html">
      Allow from all
      Options +Indexes
 </Directory>
 SSLEngine on
 SSLCertificateFile /home/appstore/certs/mydomain.org.uk.crt
 SSLCertificateKeyFile /home/appstore/certs/mydomain.org.uk.key
 SSLCertificateChainFile /home/appstore/certs/gs_intermediate_ca.crt
</VirtualHost>

This works fine when I browse to the first domain, but when I go to the second, the first domain is displayed. What am I doing wrong?

Thanks in advance.