help with cfmail url link

hi

my mail code is below:

<CFSET Path1 = "#APPLICATION.ROOTPATH#/index.cfm?fuseaction=customerReport&isemailPopUP=Y&fileName=#trim(txt_fileName)#">

<cfmail

    to=""

    from=""

    subject="">

Please note that the following file has been posted '#trim(txt_fileName)#'.

Direct Link to File: <#Path1#>

</cfmail>

Eg of the mail received

s

body: 

body:  Dear

body: 

body: 

body:  Please note that the following file has been posted '1  ColdFusion Coding Standards.docx'.

body: 

body: 

body:  : 

body:  Direct Link to File: <http://website.com/sales/index.cfm?fuseaction=customerReport&isemailPopUP=Y&fileName=1  ColdFusion Coding Standards.docx>

body:  

body: 

body: 

Now the problem is when the user clicks on the hyperlink to download the file ,special characters link _ (underscore) or some unicode characters are inserted in the file name between 1 and Coldfusion. because two empty spaces are  there in the file name .so the file is not downloaded..

how to resolve this issue