getting data as attachment from another pc

how to get the file in another pc using coldfusion, im having trouble in getting data as attachment from another pc, heres the scenario:

in my cfmail i need to get file from another pc  to be attached on my mail.i need to get the file automatically . i am using cfdirectory to get the file but its not working if the file is outside the server, can somebody has a solution to this?
 here is my code:
<cfif IsDefined("form.mail")>
      <cfif form.mailto is not "">
            <cfmail to = "#form.mailto#"
                  CC="t"
                  from = "#form.mailfrom#"
                  subject = "#form.subject#">
                        #form.message#
                  <cfmailparam file="D:/CURRENT TASK/cache/#form.attachment#">
            </cfmail>
                        <h3>Thank you</h3>
            Your message has been sent to <em style="color: #990000;"><cfoutput>#form.mailto#</cfoutput></em>.
            
      </cfif>      
<cfelse>

      <cfset CurrentPage=GetFileFromPath(GetTemplatePath())>
      <cfdirectory directory="D:/CURRENT TASK//cache" name="dirQuery" action="list">
      
      <form action="#CurrentPage#" name="theForm"  method="post">            
       <!---Get all directory information in a query of queries.--->
      <cfquery  name="dirsOnly" dbtype="query">
      SELECT name FROM dirQuery
      order by dateLastModified desc
      </cfquery>
      <cfdump var="#dirsOnly#">
      <cfoutput>#dirsOnly.name#</cfoutput>
      <table width="598" height="180" border="0" align="center" cellpadding="1" cellspacing="1">
      <tr>
            <td width="16%" class="columnheader">&nbsp;<strong>To :</strong></td>
            <td width="84%" class="listdetail"><input type = "Text" name = "mailto" class="input"  value="<cfif isdefined("url.email")><cfoutput>#url.email#</cfoutput><cfelse><cfoutput>#form.mailto#</cfoutput></cfif>" onKeyPress="return isValidEmailInput(event);"></td>
      </tr>
      <tr>
            <td  class="columnheader">&nbsp;<strong>From :</strong></td>
            <td class="listdetail"><input type = "Text" name = "mailfrom" class="input"  value="<cfif isdefined("url.sender")><cfoutput>#url.sender#</cfoutput><cfelse><cfoutput>#form.mailfrom#</cfoutput></cfif>" onKeyPress="return isValidEmailInput(event);"></td>
      </tr>
                  
      <tr>
            <td width="16%"  class="columnheader">&nbsp;<strong>Attachment:</strong></td>
            <td class="listdetail"><img src="../images/pdf-file.gif" width="22" height="22">PDF file
          <input type="text" name="attachment" class="input" value="<cfoutput>#dirsOnly.name#</cfoutput>" > </td>
                  
      </tr>
      <tr>
            <td  class="columnheader">&nbsp;<strong>Subject :</strong></td>
            <td class="listdetail">Quotation<input type="hidden" name="subject" class="input" value="Quotation"></td>
      </tr>
      <tr>
            <td valign="top"  class="columnheader">&nbsp;<strong>Message :</strong></td>
            <td class="listdetail"><textarea name="message" cols="60" rows="6" class="input"></textarea></td>
      </tr>Start Free Trial