Switching may not get you a better signal. What transponder are you on? What is your cross-poll? How many transmissions are you failing? What is your rate code?
On IA6 the satellite we are using now transponder 1046 only gives around 50 here but 1216.5 gives 85, so the signal is not really that important.
192.168.0.1 then click transmission info for transmissions passing and failing, and system info to check transponder.
192.168.0.1/advanced/advanced.html then half way down the middle part of the page you will see your rate code, probably biginning in 256 the 1/2, 2/3, or 4/5
the on the left side of the page you will see setup and under this you can go to the antenna pointing and run a cross-poll test.