If ... then statement

I cannot get N/A to print if there is no post date. Can anyone see why? Here is the code

I am using mysql and dtLastPostDate is in this format 2002-08-26 07:50:21

dtLastPostDate = rsPostdate("lastpostdate")

<%If dtLastPostDate <> "" Then%>

<font size="<%=frm_dscp_fontsz%>" face="<%=frm_dscp_fontfm%>" color="<%=frm_dscp_fontcl%>"><%=fncFmtDate(dtLas tPostDate, "%d %b %Y at %h:%N %P")%><br>
by <a href="javascript:popUp('popup_profile.asp?id=<%=rsAuthor( "MemberID")%>','popUp','width=375,height=250,scrollbars=y es')"><%=rsAuthor("lastpostmember")%></a>< /font>

<%Else%>

      <center><font size="<%=frm_dscp_fontsz%>" face="<%=frm_dscp_fontfm%>" color="<%=frm_dscp_fontcl%>">N/A</font></c enter>

<%End IF%>