Folder on Nas Disk won't mount

Dear all,

I have been searching intensely on the internet a solution to my problem but can't find any. I turn to you to help me then!

I have a NAS setup at work and I can mount only of the folders on my Macbook. When i try to mount other folders it says no such file or directory. I have tried mounting via Apple-K and using the mount_smbfs command in the terminal and it doesn't work...

This is what I see in the console when trying to access the unmountable folders via Apple K

"

06/05/2015 13:07:52,687 sharingd[301]: 13:07:52.687 : SDNetworkResolver::handleMountCallBack returned -50

06/05/2015 13:07:52,727 WindowServer[188]: WSGetSurfaceInWindow : Invalid surface 311269212 for window 816

"

I hope you can help me,

Kind regards

Macbook Pro w/ dual disk HDD and SSD. Principal disk is SSD for Yosemite 10.10..