Gaussian problem

[Sebastien Laugaro <laugaro.-at-.ccr.jussieu.fr>]

 Hy,
I work on Gaussian and I have a problem. In fact, when I use
 B3LYP/6-31G* OPT  TEST Int(Grid=35110) , I have a error message :
 'Convergence Failure. Error Termination'. When I use the same file and
 HF/STO-3G OPT TEST Int(Grid=35110), I have no problem.
 Can you help me to resolve my problem.
 Thank you.
               Sebastien.
 
              laugaro.-at-.ccr.jussieu.fr