Eileen,
There are so many variables as to why you lost signal, the biggest factor is the size of your dish, Then line of sight to the satelite, the weather, the quality LNB (the bobbly bit on the end of the arm).
If you got good signal & then lost it at the same time every day, then I'd suspect that at that time something crossed your dish'es line of sight and blocked the signal!
when in Frejus we use a 80cm one and have no problems at all.