Sir I have this problem, 
 
>  res <-
maxLik(logLik=loglik1,start=c(a=1.5,b=1.5,c=1.5,dee=2),method="BFGS")
There were 50 or more warnings (use warnings() to see the
first 50)
> summary(res)
"Maximum Likelihood estimation
BFGS maximisation, 0 iterations
Return code 100: Initial value out of range."
 
Dear sir how we give the initial value to estimate the
parameters.
Reg,
Farrukh
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