pop_up_profile.asp
line 355
<td background="<% = strTableProfileBgImage %>" bgcolor="<% =(strTableRowProfileColour) %>" class="text"><% Response.Write("<a href=""javascript:openInMainWin('pm_new_message_form.asp?name=" & Server.URLEncode(strUsername) & "')""><img src=""" & strImagePath & "pm_icon.gif"" border=""0"" align=""absmiddle"" alt=""" & strTxtSendPrivateMessage & """></a>") %></td>
must be
<td background="<% = strTableProfileBgImage %>" bgcolor="<% =(strTableRowProfileColour) %>" class="text"><% Response.Write("<a href=""javascript:openInMainWin('pm_new_message_form.asp?name=" & strUsername & "')""><img src=""" & strImagePath & "pm_icon.gif"" border=""0"" align=""absmiddle"" alt=""" & strTxtSendPrivateMessage & """></a>") %></td>
Please test this change.