Errors in Apache logs

We are getting a fair number of these errors in our Apache error log. We
have SSL configured but do not require it. The Apache config has
82    <VirtualHost *:443>  83         SSLEngine On  84        
SSLAppName QIBM_HTTP_SERVER_AS400SEC  85         SSLClientAuth None  86 
       SetEnv HTTPS_PORT 443  87    </VirtualHost>
Are there any directives we might be missing that could eliminate these
errors ?
 
 
[Tue Jan 25 00:29:54 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:30:24 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:35:30 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:36:25 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:36:45 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:48:53 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:50:17 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:52:37 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:55:46 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:55:53 2005] [error] ZSRV_MSG0216: Error occurred during
SSL processing, error = 406.
[Tue Jan 25 00:55:53 2005] [error] ZSRV_MSG0252: SSL initialization
operation failed, return code error = 3426.
[Tue Jan 25 00:56:17 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 00:56:31 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 01:00:57 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 01:08:02 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 01:13:00 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 01:14:40 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 01:15:03 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.
[Tue Jan 25 01:15:39 2005] [error] ZSRV_MSG0214: Improperly formated
certificate or certificate not valid, error = 415.