R help - Oct 2005 - lmer and grouping fators

Hi,

I make this model using lme

m.lme <- lme(Glycogen~Treatment,random=~1|rTrt/Liver)

How to make this using lmer?

I try
> m.lmer <- lmer(Glycogen~Treatment+(1|rTrt/Liver))
Erro em lmer(Glycogen ~ Treatment + (1 | rTrt/Liver)) : 
	entry 0 in matrix[0,0] has row 2147483647 and column 2147483647
Al??m disso: Mensagem de aviso:
/ not meaningful for factors in: Ops.factor(rTrt, Liver) 

lmer dont accept / for make nesting or splitplot analysis?

Thanks

Ronaldo

ps. where I can find more lmer documentation?
-- 
The Eiffel Tower <--> Feel hotter wife
                -- anagrama
--
|>   // | \\   [***********************************]
|   ( ??   ?? )  [Ronaldo Reis J??nior                ]
|>      V      [UFV/DBA-Entomologia                ]
|    /     \   [36570-000 Vi??osa - MG              ]
|>  /(.''`.)\  [Fone: 31-3899-4007                 ]
|  /(: :'  :)\ [chrysopa at insecta.ufv.br            ]
|>/ (`. `'` ) \[ICQ#: 5692561 | LinuxUser#: 205366 ]
|    ( `-  )   [***********************************]
|>>  _/   \_Powered by GNU/Debian Woody/Sarge