Fillet problem

 From:  ArianDesign (ARIANSHAMIL)
6898.1 
Ciao to everybody!
Nice to meet you all! I'm Arian and this is my first post!
I'm new to Moi (i'm using it just from few days...)
I'm doing my second model with Moi and i'm playing a little with surfaces but i'm having a lot of problem with fillets...a lot of time i'm not able to do fillets :( ...i'm really new to surface modelling and to Moi too so i've a lot to learn...so i'm asking to you if do you have some advices about fillets....probably (99% surely :D) i'm wrong something...
I've attached two pictures to show to you my problems....
Thanks in advance for any help and excuse me for my very poor english ;)
Ciao
Arian