Load Balancing Question

Great, thank you.

Here is our config:

}
node 192.168.199.10 {
   screen server a
}
node 192.168.199.20 {
   screen server b
}
node 192.168.199.30 {
   screen server c
}
pool iis_web_pool {
   lb method member least conn
   monitor all http and tcp
   member 192.168.199.10:80
   member 192.168.199.20:80
   member 192.168.199.30:80
}
snatpool iis_snat {
   member 192.168.199.50
}
virtual vs_iis {
   destination 192.168.199.50:80
   snatpool iis_snat
   ip protocol tcp
   profile http tcp
   pool iis_web_pool
}

Given that information above would you think our configuration is correct? The reason I ask is for whatever reason I cannot ping our virtual server IP address and I'm trying to determine if that's something wrong with the F5 or our network switch.

Just to reiterate the self-ip is 192.168.199.51 (only one VLAN) and the default gateway on the servers points to our router, which is 192.168.199.1

Thanks in advance.