I can connect to it but it doesn't hash anymore..
.. Was hashing for about 4-5 months, any ideas on what could of stopped it? The miner status page only says "This section contains no values yet".
First you might try to reboot it from the Gui (System, Reboot, click on 'perform reboot'), or do it from AntMonitor. If that doens't resolve it try to turn off the power supply, let it rest for a few minutes, then restart.
If these steps don't do it, start trouble shooting your stuff (measure power supply voltages, make sure that your settings are still correct, no burnt components on the S1 etc.)
Cheers