  Within a Monte Carlo technique we examine critical properties of diluted bulk
magnetic semiconductor (Ga,Mn)As modeled by a strongly diluted ferromagnetic
Heisenberg spin-$\frac{5}{2}$ system on a face centered cubic lattice. We
assumed that 5\% of Ga atoms is substituted by Mn atoms and the interaction
between them is of the RKKY-type. The considered system is randomly quenched
and a double average was performed: firstly, over the Boltzmann probability
distribution and secondly - over 2048 configurations related to the quenched
disorder. We estimated the critical temperature: $T_c=97\pm6$ K, which is in
agreement with the experiment. The calculated high value of critical exponent
$\nu$ seems to point to a possibility of non-universal critical behavior.
