I am trying to install a VeriSign certificate on DiscountASP.net and get the follow error: Error: Contains multiple certificates. Submit only your certificate, not the entire chain. So I went to VeriSign support and they tell me they do not issue single root certificates anymore and have not since 12/2008. We paid for and went through all the procedures with VeriSign based upon the recommendation by KB ID:136 I hope we can use the cert and plan to go live tomorrow. What can we do???
Sounds like the provider gave you more then one certificate under the file. Email/contact verisign and ask if you can get the user certificate without the intermediate certificate.
I'd recommend that you open a support ticket in the helpdesk, so that support can see if it's possible to install it manually. At least this way support can see if there's any problems.
I went back and forth between VeriSign and DiscountASP.net support and finally we figured out that I needed to download the X.509 version of the certificate that VeriSign told me would not work on a Microsoft server. And it worked perfectly. They had been giving me a cert with the user and intermediate cert chained together. So, be sure to get the user only which is the X.509 Thanks!