>in my case, i took the languege course for just 1 year. and in languege school has contact with insurence company so i could get it very easy and i'v paying just 30Euro per month. it calls student insurence. and then i could deley the visa for 1 year just one time.but you have to take the languege course and go wich you already booked because they(in German "Auslaenderboehder"?) call to your languege school. ya, they checked you study in that school.