How to completely remove old certificate on sbs 2011, that is overriding new one?

I am trying to access a remote desktop gateway on a terminal server ive setup.

I installed a new cert on the DC and the terminal server (probably dont need it installed here), but when I try to connect (with properly setup RDP and installed cert) It points to an old cert on the DC issued to that is not needed, RWW isnt used.

I deleted them in mmc, but it still wont allow me in. How can I get rid of old certs? Its sbs2011 and when I try to install a new trusted cert the wizard crashes.  I did install the certs the normal way and add them to trusted...
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Patrick BogersDatacenter platform engineer LindowsCommented:

Check IIS and its installed certificates. Could be there is still the old one installed and bound to .

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savethehumansAuthor Commented:
I've requested that this question be deleted for the following reason:

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Windows Server 2012

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