Adding cache-size=[cache size] to dnsmasq?

[josh4trunks]

System - PFSense 2.0 64bit
I can't get dnsmasq to run from the gui whenever i add "cache-size=2000" to any config files (including to the gui). Here are my testing results.

Input = Services > DNS Forwarder > Advanced > input "cache-size=2000" > Save
Output = The changes have been applied successfully / Status > Services > dnsmasq=Stopped

Input = Services > DNS Forwarder > Advanced > input another valid option like "addn-hosts=/usr/local/etc/dlhosts" > Save
Output = The changes have been applied successfully / Status > Services > dnsmasq=Running

Input = Services > DNS Forwarder > Advanced > input another invalid option like "invalid-option=yes" > Save
Output = The following input errors were detected: Invalid custom options / Status > Services > dnsmasq=Stopped

Input = vi /usr/local/etc/dnsmasq.conf > input "cache-size=2000"
killall dnsmasq
dnsmasq
Output = Status > Services > dnsmasq=Running

Input = vi /usr/local/etc/dnsmasq.conf > input "cache-size=2000"
Status > Services > Restart dnsmasq
Output = Status > Services > dnsmasq=Stopped

Input = vi /usr/local/etc/dnsmasq.conf > input another valid option such as "addn-hosts=/usr/local/etc/dlhosts"
Status > Services > Restart dnsmasq
Output = Status > Services > dnsmasq=Running

Input = killall dnsmasq
dnsmasq --cache-size=2000
Output = Status > Services > dnsmasq=Running

So basically..
*If I ever add the option "cache-size=[cache size]" to a config file, such as "/usr/local/etc/dnsmasq.conf" or to the Advanced box under Services > DNS Forwarder I cannot have the PFSense gui start dnsmasq.
*I can put other valid options on these two config area and dnsmasq starts just fine from the gui.
*I can also start dnsmasq from an SSH session with the "cache-size=[cache size]" option either in a config file or by just appending the "dnsmasq" command.

Can anyone point me in the right direction to be ble to add the "cache-size=[cache size]" options to dnsmasq (preferabliy in the gui)?
Thanks

[stephenyeong]

checked on pfsense console,
ps -A | grep dns

found following
/usr/local/sbin/dnsmasq –local-ttl 1 --all-servers --rebind-localhost-ok --stop-dns-rebind --dns-forward-max=5000 --cache-size=10000

seems current cache max is 10000