Dear Feffusers,

Thank you all for your attention.

The problem was in fact in the first two columns containing non-numerical characters; Athena now reads my data correctly.

Thanks Bruce, Norbert and Matt for the valuable tips and suggestions...

Mauricio

                                                        
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       Maurício Antonio Pereira da Silva
                Departamento de Física
           Grupo de Dinâmica Molecular
 Universidade Federal de São Carlos - UFSCar
Via Washington Luiz, km 235 Vila Monjolinho
        13565-905 São Carlos - SP   Brasil

         Tel: +55 (16) 33 51 82 22, ramal 262
               Fax: +55 (16) 33 61 48 35
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