Signing a RDP for RDS results in corruption

I created an RDP file by entering in the information and clicking save as in a RDC dialog box. However, I get the warning stating The publisher of this remote computer can't be identified. I attempt to sign the RDP file using rdpsign. I use capital letters in my hash. It corrupts the file. I run fixsignRdp.vbs from here and still it is corrupted. Is it possible or is there a better way to get a signed RDP file for my RDS/Terminal Server. I am running it on 2008R2 6.1.7601.