Making PayFlow Pro Https call using Coldfusion

Paypal is no longer supporting the CFX tag that many CF developers have used to execute credit card transactions starting Sept 2009.  As PayPal generally sucks, there is very little reliable information on how to use PayPals API to make these transactions work via ColdFusion.  I cant possibly be the only CF developer with this problem.

Any help would be greatly appreciated.  The code I'm using to execute test transactions is below.   I seem to be able to connect but I'm constantly getting the following error:

RESULT=1&RESPMSG=User authentication failed

The documentation says to use the same login parameters that I use to login to the PayPal Manager (the GUI used to manage my account), but I keep getting authentication errors. Please note that the VENDOR and USERNAME are one and the same, this is supposed to be OK, or at least that's what the documentation says.  Assuming my login parameters are correct, what could I possibly be doing wrong.
<cfset username = "MyUserName">
<cfset password = "MyPassword">
<cfset partner = "verisign">
<cfset vendor = "MyUserName">
<cfset amount = "1.66">
<cfset ExpirationDate = "1015">
<cfset CCnumber = "4111111111111111">
 
<CFSET PARAM="USER=#username#&PWD=#password#&PARTNER=#partner#&VENDOR=#username#&TRXTYPE=S&TENDER=C&AMT=#amount#&EXPDATE=#ExpirationDate#&ACCT=#CCnumber#">
<cfoutput>param = #PARAM#</cfoutput>
<hr>
 
<CFHTTP url="https://pilot-payflowpro.paypal.com" method="post" resolveurl="no" timeout="30" port="443">
<CFHTTPPARAM type="header" name="X-VPS-REQUEST-ID" value="#CreateUUID()#">
<CFHTTPPARAM type="header" name="X-VPS-CLIENT-TIMEOUT" value="30">
<CFHTTPPARAM type="header" name="Content-Length" value="200">
<CFHTTPPARAM type="header" name="Content-Type" value="text/namevalue">
<cfhttpparam type="header" name="Host" value="pilot-payflowpro.paypal.com">
<cfhttpparam type="header" name="X-VPS-VITCLIENTCERTIFICATION-ID" VALUE="verisignnyplcommerce">
<CFHTTPPARAM type="body" name="" value="#PARAM#">
</CFHTTP>
 
<cfoutput>#cfhttp.filecontent#</cfoutput>

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xamianAsked:
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SidFishesCommented:
looks ok to me...pretty much what i use.

First thing to check is that Uname is case sensitive (possibly vendor as well)

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xamianAuthor Commented:
Nevermind....
So it turns out that CF5 doesn't support the manipulation of HTTP request headers.  When I moved my test page from our CF5 server to one of our CF7 servers it worked like a charm.
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