multiple sites across subdomains, module wont work

Hi

I have multiple sites across sub-domains as follows:

example.com (main site)
sandbox.example.com (development area)
test.example.com (testing environment)

I have been using the SecurePages module on the main site with my SSL certificate from Comodo and it worked fine, however i had to switch the module off in the other 2 environments. I have just upgraded my SSL certificate to a Wild Card certificate (*.example.com) so i want to now also enable HTTPS on my other 2 sub-domains, however switching the SecurePages module on the sub-domains doesn't work, when i do it i am served the Main site under https://sandbox or https://test

The sites are all separate using separate databases, i handle everything through git (beanstalk-app).

Not sure what i need to do to be able to get this working, can someone help me please? Would really appreciate it.

Thank you