strange issue with cifs client

Hello All,

I have currently windows 7 client that playing music title from Netapp storage via cifs. The problem is we have suddenly Failed to read from file: \\192.168.2.134\dalet\storage\SPLIT_Audio_2\00007c59.mp2 (The specified network name is no longer available. I did a capture and i not quit sure what i where to pin point the issue its looks from client side for me but i am not sure. I have many Ack's not seen from client side but cant really uderstand why and high RTT to Ac'k , if someone could assist me to understand where is the issue exist , below attached link to trace in cloudshark. https://www.cloudshark.org/captures/fc6dd41cfd51

Please advice Thanks