Problem in create certificate programmatically

hi

i wrote a wcf service that create a certificate

i used from CERTCLIENTLib dll for create certificates

Certificate cert =newCertificate();
 cert.createRequest("name","friendlyName");
 cert.sendRequest();byte[] result=cert.acceptPKCS7("password","name");

when i run it on local ,it's right , and when i saw in internet options , that certificate built

but when i published it on iis , not work

when i debug it , i can get the result from below line :

cert.acceptPKCS7("password","name");

but when i went to internet options , the certificate not built

please help me for solve it

thanks