Thanks Kat for your help. It worked! My mistake was because I changed elevation on the dish instead of changing elevation of HH rotor itself. Also, setting LNB farther away from the dish helped a little bit on signal quality.
I was able to get upto 60% signal quality on satellites to my west and upto 99% on satellites to my east. This might be because I am in east coast. I followed instructions written in
Stab manual and tried to find a signal quality from the nearest satellite to my south (AMC5). Then with little adjustments for easterly T5 and westerly Echostar3, I was able to have signal on both east and west satellites. Thanks again for your prompt support.
Ali