makecert fails - Error: CryptCertStrToNameW failed

I'm on a Windows Vista system.
I download the microsoft sdk in order to be able to make certificates for this application I'm trying to get loaded.

based on the installation manual, I type the following command to create a certificate:

C:\Program Files\Microsoft SDKs\Windows\v6.0\Bin>makecert -n "CN=norcron-develop
" -pe -sr localMachine -ss My -a sha1 -sky exchange

I've had a number of people look at the command and everyone seems to think it is valid.
However, I get the following error:

Error: CryptCertStrToNameW failed => 0x80092023 (-2146885597)
Failed

There are no other certificates set up currently.
The makecert version is 6.0.6000.16384

Help ... I'm stuck.
Thanks
Eric