Q: Finder crashes when connecting to server (10.9.4)

I have been having an issue with my Mac Mini the last few days when it tries to connect to my local server.

The first few times I can access the server normally through Finder, but after a few goes Finder freezes (spinning beach ball on finder - other apps work ok) up completely and needs to be restarted. Once it has restarted and I re-open Finder, it freezes up again completely until I restart my computer. The same applies when I try to access the server from other apps (eg. when adding a photo from the server to something in Chrome).

I have reset PRAM, verified/repaired disk, run CCleaner.

Any solutions to this issue?

Mac Mini mid-2011

Processor  2.5 GHz Intel Core i5

Memory  4 GB 1333 MHz DDR3

Running 10.9.4