Thanks for answer, i've tried mining some eMark block and is all ok. I've got some problem with Tekcoin: my miner say i've found blocks (9 this night), but my wallet write 0 blocks. How is the situation about this coin ?

http://digilander.libero.it/mpeglayer3/tekcoin%20mancanti.jpg

http://digilander.libero.it/mpeglayer3/tekcoin%20mancanti2.jpg