Hello Hello

I have two questions 

1. I cannot open my dnn site with webmatrix infact i cannot open any dnn site with webmatrix. The error reads as follow: the site has stopped. I suspect IIS is having something to do with this error

2. I cant create a site with Webmatrix because of SQL sa password when i was installing sql i dnt remember being asked to enter sa password. i tried changing it but i couldnt it doesnt change.