I have the same problem, I can not get C Band to work on the DM7025 with the C Band LNB setup, either under C Band or universal setup.
You can trick the DM7025 to tune C band by getting your calculator out and first placing 5150 minus the desired transponder eg 3800 which = 1350 then add this to the 9750 LNBF =11100 input this in the manual transponder setting and all the Symbol rate Pol and FEC then scan, the required C Band signal will then load.
You can do this with the DM7020 LNB settings in Universal or C Band or user config, so thhis proves that these setting have NO EFFECT, they are all the same.
Get your act together Dream, we in the rest of the world do not just use Universal settings, there are alternatives, you finally got 11300 LNB IF to work after much complaining, A lot of people around the world have C band or unique LNB satellite setups.
I am an offical Australian DM7025 beta tester.