Getting error while ADFS SSO authentication using Fedlet using asp.net

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C#

ASP.NET

I want to implement SSO for ADFS 2.0 using Fedlet.

I am getting following error while Fedlet (SP) initiated Single Sign-On using HTTP POST binding

XML can not be signed due to either empty or unknown signature certificate alias in extended metadata.

I am using following part in the sp.xml file

    <SPSSODescriptor AuthnRequestsSigned="true" WantAssertionsSigned="true" protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol">
		<KeyDescriptor use="signing">
            <dsig:KeyInfo xmlns:dsig="http://www.w3.org/2000/09/xmldsig#">
                <dsig:X509Data>
                    <dsig:X509Certificate>
                        30 82 01 0a 02 82 01 01 00 86 8b 27 30 03 35 3a 07 3a 20 96 d6 ed f4 b3 17 92 a0 d0 78 21 90 72 e3 26 9e bf 79 25 ee 56 ae e6 5b 0d 84 21 02 18 9b d3 df 55 8c 31 b0 6c bd 60 d4 d9 6e 4b 16 f6 96 34 e2 df 97 7e 0a 43 be e7 cc a3 7a 9c b9 d5 5a a0 8d fa 19 62 c8 85 58 ca 39 a7 51 57 94 6a bd 83 b1 03 ec 40 d1 6a 83 ac 48 9b 22 3d 7c 47 eb 75 a7 e3 2f 10 26 aa 51 31 56 9a bf 98 df bc b5 b2 a0 61 31 8d 18 26 cc fd 07 65 1c 4a fc 0a 32 6e 19 44 43 63 d6 b3 80 de f0 f6 83 a1 14 89 df ad 46 7d 0e c0 a7 86 77 95 08 12 9c f6 19 17 85 e1 b6 25 b0 04 2c 48 e4 27 21 fb 8f 42 91 33 95 57 6e 7c 50 13 93 91 ac 59 f5 7a 31 9e 83 8e bd 6a fd 56 79 8e 84 80 e2 04 9e 1a 85 15 79 5b 60 92 1a ac 90 13 9b 66 f5 e6 f7 d0 2a 2c 7d 23 71 15 53 bf 9c 3e c4 5c 6a b6 60 15 a1 14 03 e5 06 22 45 d7 bb 57 53 17 17 02 03 01 00 01

                    </dsig:X509Certificate>
                    <dsig:X509IssuerSerial>
                        <dsig:X509IssuerName>CN = ADFS Signing - site details.com</dsig:X509IssuerName>
                        <!--<dsig:X509SerialNumber>?a9 a3 d3 07 9d 1d 13 ba 79 7b 06 06 94 97 04 cc f6 fb 91 e3</dsig:X509SerialNumber>-->
                    </dsig:X509IssuerSerial>
                    <dsig:X509SubjectName>CN = ADFS Signing - site details.com</dsig:X509SubjectName>
                </dsig:X509Data>
            </dsig:KeyInfo>
</KeyDescriptor>

Is SSL is required for both Identity Provider(IdP) and Service provider(SP). We have active SSL certificate at Idp side but no active SSL at SP side. Is this problem is due to SSL certificate?