Mcculloch 32cc chainsaw?

I can start my chainsaw but it won't stay running.
The start Instructions are:
I prime the bulb 10 times.
I put choke on full.
I set throtle advance.
I pull rope 4 times.
I set choke to 1/2 and start.
It starts runs up high then dies.
Even when I push choke all the way in it still dies.

Does anyone know what to do.

Garell
March 2011