[R] Confindence interval for Levenberg-Marquardt fit

[Michael Dondrup]

Dear all,
I would like to use the Levenberg-Marquardt algorithm for non-linear 
least-squares regression using function nls.lm. Can anybody help  me to 
   find a a way to compute confidence intervals on the  fitted 
parameters as it is possible for nls (using confint.nls, which does not 
work for nls.lm)?

Thank you for your help
Michael