CWSerial/CWGPIB on Win7 :"The subject is not trusted for the specified action"

Question

Hello,
I'm currently trying to migrate a VBA software from WinXP + Excel2000 to Win7 + Excel2010 and I'm encountering a big problem. The software is using activeX control such as CWSerial and CWGPIB but when I'm trying to add them I get the following error "The subject is not trusted for the specified action".
I'm more or less certain it's a permission problem, I just can't figure out how to solve it. I'm also pretty sure it's not a VBA version problem because I tried to do the same manipulation on a Win7 + Excel2000 machine and got the same error, so it must be related to the OS.
What I have already tried:
Regsvr32 on cwinstr.ocx.
Downgrading the Microsoft Office version to 2000 again.
Set Excel's Trust Center to enable all controls without restriction.
Fiddle with the registry keys following instructions on internet for similar problems.
Re-install everything on a new machine.
Did anybody face the same problem and/or has a solution? I'm working on a Virtual Machine so I can test every idea without fearing data loss.
Thank you for your help!

Answer 1

The only way to know what is going on is to retrieve the certificate and check who is the issuer.<br />
It is always possible that the server doesn't send the full certificate chain (intermediate certificates), so it might help to post a link to this website
Check the date and time in the clock on your computer: (double) click the clock icon on the Windows Taskbar.
Check out why the site is untrusted and click "Technical Details to expand this section.<br>If the certificate is not trusted because no issuer chain was provided (sec_error_unknown_issuer) then see if you can install this intermediate certificate from another source.
You can retrieve the certificate and check details like who issued certificates and expiration dates of certificates.
*Click the link at the bottom of the error page: "I Understand the Risks"
Let Firefox retrieve the certificate: "Add Exception" -> "Get Certificate".
*Click the "View..." button and inspect the certificate and check who is the issuer of the certificate.
You can see more Details like intermediate certificates that are used in the Details pane.
If "I Understand the Risks" is missing then this page may be opened in an (i)frame and in that case try the right-click context menu and use "This Frame: Open Frame in New Tab".
*Note that some firewalls monitor (secure) connections and that programs like Sendori or FiddlerRoot can intercept connections and send their own certificate instead of the website's certificate.
*Note that it is not recommended to add a permanent exception in cases like this, so only use it to inspect the certificate.