Question: Error, (in dsolve/numeric/bvp) division by zero

Hi every one,

I am facing a situation here. Whenever, I sub n = 0 or 1, the following ode has a solution. 

But when I adopt other values except the above ones then the maple gives me the error

"division by zero". 

eq11:=(diff(((abs(diff(f(eta),eta,eta)))^(n-1)*diff(f(eta),eta,eta)),eta)
+n/(n+1)*f(eta)*diff(f(eta),eta,eta))=0;
resx:=dsolve({eq11,f(0)=1,D(f)(0)=0,D(f)(12)=0},numeric,method = bvp[midrich],
 output=listprocedure);
your useful input is required.
Thanks
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