[kcazbarach]

Ok so i have hd 555s, and the pa2v2. I have it all set up, but when i put the jack into the laptop (coming from the portable amp) it asks me whether to do line out or headphone. Now i believe I was suppose to do lineout, that's all i ever  hear about when using mixamps, but when i choose lineout-i still get audio on my laptop speakers along with my headphones-so should i use lineout or headphones?
 
and if i should choose lineout, anybody have an idea how to stop my laptop speakers.
 
 
Any help would be appreciated thanks.