Simple restart bat for miner

[NeXsus]

hi guys I was trying to make a simple bat file to restart my cpu miner but I have been unable to make much progress

any help is appreciated

what I have so far, the switches don't seem to work I've tried quotes etc

@echo off
:loop
start "C:\path\minerd.exe" -a quark --url stratum+tcp://poolinfo -u user -p pass"
timeout /t 1800 >null
:Exit
Taskkill /IM minerd.exe /f /t
goto loop