No hashes loaded error.... help me pls

[lsaller]

I'm trying to crack a wpa2 wifi password, and when i want to use hashcut i have a problem.....
im using virtual box with The-Distribution-Which-Does-Not-Handle-OpenCL-Well (Kali) linux.
*console*

hashcat -m 2500 -a 0 /root/Desktop/capture.hcccapx /root/hashcat/rockyou.txt --force

hashcat (v5.1.0) starting...

 No hashes load....
and quits.... Please someone help me, i dont know what to do