CFHTTP ODD ERROR

I have this code
Example #1

<cffile action = "read" file = "./config.txt" variable = "fileContents">

<cfset line1 = listGetAt(fileContents, 1, chr(10))>

<cfset line2 = listGetAt(fileContents, 2, chr(10))>

<cfset AuthKey = #mid(line1,19)#>

<cfset RefToken = #mid(line2,15)#>

<cfset contentBody = "grant_type=refresh_token&client_id=bcbb1365893&client_secret=62b5a8a84567992666tf986a3f474791e&refresh_token=9312beb987fbd8efebf6dc&scope=read%2Bwrite" />

<cfhttp method="POST" url="https://api.wedoo.com/oauth2/access_token">

<cfhttpparam type="header" name="Content-Type" value="application/x-www-form-urlencoded" />

<cfhttpparam type="formfield" name="grant_type" value="refresh_token" />

<cfhttpparam type="formfield" name="client_id" value="bcqq13f2d1d320543524">

<cfhttpparam type="formfield" name="client_secret" value="62b5a8a84567992666tf986a3f474791e" />

<cfhttpparam type="formfield" name="scope" value="read+write" />

<cfhttpparam type="formfield" name="refresh_token" value="#RefToken#" />

</cfhttp>

<cfset cfData = cfhttp.filecontent />

<cfoutput>#cfData#</cfoutput>

When I run this code I get a 500 error. I'm on a Railo server so I don't get any more info.

I can confirm the RefToken  value from line 5 is 239hy9uiw784fbew43y7

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But when I actually put the RefToken value in the code it works fine..like this
Example #2
<cffile action = "read" file = "./config.txt" variable = "fileContents">
<cfset line1 = listGetAt(fileContents, 1, chr(10))>

<cfset line2 = listGetAt(fileContents, 2, chr(10))>

<cfset AuthKey = #mid(line1,19)#>

<cfset RefToken = #mid(line2,15)#>

<cfset RefToken = 239hy9uiw784fbew43y7>

<cfset contentBody = "grant_type=refresh_token&client_id=bcbb1365893&client_secret=62b5a8a84567992666tf986a3f474791e&refresh_token=9312beb987fbd8efebf6dc&scope=read%2Bwrite" />

<cfhttp method="POST" url="https://api.wedoo.com/oauth2/access_token">

<cfhttpparam type="header" name="Content-Type" value="application/x-www-form-urlencoded" />

<cfhttpparam type="formfield" name="grant_type" value="refresh_token" />

<cfhttpparam type="formfield" name="client_id" value="bcqq13f2d1d320543524">

<cfhttpparam type="formfield" name="client_secret" value="62b5a8a84567992666tf986a3f474791e" />

<cfhttpparam type="formfield" name="scope" value="read+write" />

<cfhttpparam type="formfield" name="refresh_token" value="239hy9uiw784fbew43y7" />

</cfhttp>

<cfset cfData = cfhttp.filecontent />

<cfoutput>#cfData#</cfoutput>

When I actually put the refresh_token value in the code like in example #2 it works fine.

1. Has anyone ever encountered this?
2. Do I have a single quote double quote issue?
3. Do I need to encode the RefToken value when its inside cfhttp tag?
4. Are there other parameters that I could add to the cfhttpparam  tag?
5. Is there another step I need to take when setting the RefToken value?