Browsing network folders too slow

Hi all

I got a problem with network folders, i cannnot browse them
-except the domain controller's- they are too slow.

There are no problem with ping.

\\machine or \\192.168.xx.yy give same result. When I run -Win+R -
\\machine\c$ for example, the window appears in 10 seconds, maybe more.
Changing a folder also takes 10~30 seconds. Again; \\domaincontroller got
no problem, it works like local disk.

Any comment/advice?


Thanks.