[R] question

[cfinet@ens-lyon.fr]

I do not manage to make a Fisher´s exact test with the next matrix :

    [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10] [,11] [,12]
[1,]    1    3    0    1    2    9    0    0    2     5     8     6
[2,]    0    3    3    0    0    0    0    5    0     3     0     0
[3,]    0    0    0    0    0   10    0    0    0     0    10     0
[4,]    0    2    0    2    6   14    0    0    6     0    10     6
[5,]    0    5    0    0    0    7    0    0    0     2     8     0
[6,]    0    0    1    9    4    7    2    1    4     2    12     5
[7,]    0    6    0    0    0    0    0    0    0     5     1     3

but I do not understand why it does not work since I obtain the next error 
message :



> fisher.test(enfin.matrix)
Error in fisher.test(enfin.matrix) : Bug in FEXACT: gave negative key

thank you for considering my application

cédric finet