One thing you might need to check if you have problems is the cable from the dish to the receiver.
If it is very old or damaged this might need changing.
Also have you thought about a new coat of paint on that old dish. Just get yourself an aerosol in any colour you fancy, but make sure it is Matt (not gloss, semi-gloss) or you will "cook" your LNB.
william1903, what sort of channels are you after i.e. English, German, French.
Check out this link www.lyngsat.com/freetv
Then click on Europe and select which country (or countrys) you want
Once you know what channels you need, then it is just a matter of reading which satellites they come from, piece of cake.