Hey guys,
I'm really new to maya and I have a problem on my first model. Until now, it's pretty simple geometry, but somehow smoothing leads to a strange result...

https://imageshack.us/photo/my-images/839/prob1r.jpg/

https://imageshack.us/photo/my-images/191/prob2h.jpg/

any ideas? i'd be really thankful for your tipps...