Hi,
Not sure if you have provided complete error but it seems you are trying to validate OCSP? I will suggest to use the command - certutil -url path\Server.cer
Once the box is opened dialog box switch radio button to OCSP and click Verify. This will return Verified if OCSP is working and certificate is ok. Also you can use 'certutil -verify -urlfetch' command to validate certificate and certificate chain. During this test certutil will check certificate revocation status through OCSP.
Also consider to use OCSP Responder MMC snap-in. For this you will have to install the OCSP management tools.
Hope this helps.
JS
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