Trusted root Certificate upload is failing with PKCS7 format certificates

Access Manager setup and working well.Administrator tried to import a PKCS7 formatted file into the Admin Console but the following exception was thrown: The following exception is shown in admin console catalina logs

 com.novell.nids.certmgr.DirCertException: Error: PKI_E_PARSE_CERTIFICATE,
Error: -1240 at com.novell.nids.certmgr.DirCerts.importTrustedRoot(Unknown Source)
at com.volera.roma.app.handler.CertHandler.k(y:5119) at com.volera.roma.app.handler.CertHandler.E(y:4935)
at com.volera.roma.app.handler.CertHandler.processRequest(y:285)
at com.volera.roma.servlet.GenericController.doPost(y:394) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)

Steps to reproduce.

1.Download a pem format trusted root certificate from Admin Console
2.Convert the pem format certificate to PKCS7 format. (with .p7b extension)
3.Import the converted certificate into Admin Console

Import the cert into a browser (Internet Explorer) and export it again as a CER/DER file. Then import the certificate again into the Admin Console.