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Gauge mediated supersymmetry (SUSY)-breaking (GMSB) furnishes the best ideato overcome the flavor problem in SSMs, supersymmetric stand models (SM).However, implemented in the minimal SSM (MSSM), a very serious fine-tuningproblem arises, owing to the absence of a large $A_t$ term in the stop sectorto radiatively enhance the SM-like Higgs boson mass. In the extended GMSBcoupling $H_u$ to messengers can alleviate this problem but encounters the$A_t/m_{H_u}^2$ problem, i.e., at the same time a large $m_{H_u}^2$ isgenerated, rendering radiative electroweak spontaneously breaking (EWSB)problematic. This issue shows similarity to another long-standing problem ofGMSB, the $\mu/{B_\mu }$ problem, and, of great interest, we find that they mayadmit the same solution, nonradiative EWSB. Such a solution is naturallyaccommodated when both $H_u$ and $H_d$ couple to messengers. As a bonus ofnonradiative EWSB, the sleptons tend to be very light due to the significantrenormalization group equation effect and they are able to account for the$(g-2)_\mu$ puzzle. As a concrete example, we investigate a hidden sector with$(10,\overline {10})$ messengers.

$H_{u,d}$-messenger Couplings Address the $\mu/B_\mu$ \& $A_t/m_{H_u}^2$ Problem and $(g-2)_\mu$ Puzzle