i've got a problem with the email that gets sent out by smartmailer. I have written

<a href="cwww.xyz.co.uk/registration_successful.asp"&"?Username=##Request.Form("MemberUsername"##&Activate=1">Click to activate your account</a>

But the dot between registration_successful.asp is missing from the email when it arrives in my inbox.

Can't figure out why this is happening and really need to get it fixed promptly.
Thanks.