Connection Failure. Peer not authenticated


I hope someone can help me with this.

I built a coldfusion tool that would pull in the last three tweets from our local councils account.
This has worked fine for many months now but I have just been informed that its stopped working and may have been broken for a few days.

I have looked at the code and nothing has changed.

When I run the debug on the code I get the debug messages back:

Charset = [empty string]  
ErrorDetail = I/O Exception: peer not authenticated  
Filecontent = Connection Failure  
Header = [empty string]  
Mimetype = Unable to determine MIME type of file.  
Responseheader = struct [empty] 
Statuscode = Connection Failure. Status code unavailable.  
Text = YES  </code>

I guess that the tool is not getting past the authorization but I've checked and I'm using the correct KEYS and it has been working for a while.

Heres part of my coldfusion function that attempts to connect to twitter api. I cant see anything wrong. 

<cfargument name="screen_name" required="no" default="fifecouncil">
<cfargument name="display_name" required="no" default="Fife Council">
<cfargument name="count" required="no" default="3">

<cfset consumerKey = "*****************************">
<cfset consumerSecret = "**********************************************************">
<cfset bearerToken = ToBase64(consumerKey & ":" & consumerSecret)>
<cfset authorization = "Basic " & bearerToken>

<cfhttp url="" method="post" charset="utf-8">
	<cfhttpparam type="header" name="Authorization" value="#authorization#">
	<cfhttpparam type="header" name="Content-Type" value="application/x-www-form-urlencoded;charset=UTF-8">
	<cfhttpparam type="body" value="grant_type=client_credentials">           
<cfset bearerTokenResponse = DeserializeJSON(cfhttp.fileContent)>
<cfset authorization2 = "Bearer " & bearerTokenResponse.access_token>
<cfhttp url="" method="get" charset="utf-8">
	<cfhttpparam type="header" name="Authorization" value="#authorization2#">
	<cfhttpparam type="url" name="screen_name" value="#arguments.screen_name#">
	<cfhttpparam type="url" name="count" value="#arguments.count#">


Can anyone see a problem or have any information that may help me sort this out.