2008 r2 terminal server saying licensing expires in 6 days

Hi - i'm embarrassed to admit that i don't know the answer to this, as we've installed many terminal servers here before, but am i able to specify the 2008 TS license server for my 2008 R2 TS server?  I've read many web posts saying i can, none that i cannot, however you know how searches sometimes go....

I've tried manually adding the 2008 TS license service under HKLM\System\currentcontrolset\services\termservice\parameters\licenseservers\key w my 2008 lic server

I rebooted, but still get the warning message of impending doom....

I also tried going into the powershell and running a \specifiedlicenseservers> New-Item -Name Servername command, but that returns a "the licensing type is not configured for this license server"

I'm just trying to run a vanilla 2008 r2 server for my citrix services that run on top of it.  I'm not trying to delve into any of the new RDP virtualization options.

Am i just doing this wrong, and 2008 TS lic should work for me, or do i need to install 2008 r2 lic somewhere else?  Are there any options for hosting differing versions of TS lic on the same box?  

Thanks for any help!!