Trying to get DecaRanging_Cust_MP_v3p05.exe to work

Sirs,
I am able to get DecaRanging_Cust_MP_v3p05.exe to work. I keep getting ERROR - Cannot open cheetah or connect to EVK1000 over com port
I have on the same machine get DecaRangeRTLS.exe able to get that software to run.
Thanks,
Patrick Brown
631 880 1188