How to get user's own vCard details?

hi,
Using Strophe.js, one how will get the vCard details of himself and his roster groups?

I have done the following:

var vcard_iq = $iq({ from: myfrom, id:'vc1', type: 'get' }).c('vCard', { xmlns: 'vcard-temp' });
connection.sendIQ(vcard_iq, vCard_CB);

but get 500 error with wait;

I am using MSSQL and ASP.NET As platform.

If anybody can give me a right direction, it will be a great helpful.

Thanks