NMR_MP2 [???]



I started a project on NMR ab initio calculations with GAUSSIAN 98W A.11.
I haven't problem with DFT and HF methods, but i cann't run NMR with
MP2 [#p mp2/6-311+(2d,p) nmr]. 
 WHY? (I have an Athlon Thunderbird 1GHz with 256 MB memory)
Can anyone give me an advice?
Thanks in advance.
 
 
 
Postgraduate (Ph.D) Student
Vasilios I. Teberekidis
Laboratory of Applied Quantum Chemistry
Aristotle University of Thessaloniki (Greece)
Tel.:(+30 31) 99 78 20
        +30937 66 18 18
E-mail: temper "-at-" chem.auth.gr
www: http://users.auth.gr/temper